Numbers don't lie, but graphs can.
You're reading an article, perusing an ad, or watching the news when you spot a kickass chart or infographic. Finally, a way to share information that's impermeable to opinions and falsehoods, right? Well, not exactly.
That's why, in the era of bogus news sites, information dissection is more important than ever.
Graphs and data visualizations are easier to make than ever before, so there's nothing stopping anyone from using accurate facts and figures in an irresponsible or dishonest way.
In her animated lesson for TED-Ed, Lea Gaslowitz breaks down how to catch a misleading graph before it catches you.
Here are five simple things to look for when analyzing a graph.
1. Scale: That Y-axis is really important.
This is a graph showing truck reliability. At first glance, it appears Chevy crushes the competition hands down.

However, this graph uses the same data, but with a scale from 0% to 100% instead of 95% to 100%.

"This is one of the most common ways graphs misrepresent data," Gaslowitz said. "It's especially misleading with bar graphs, since we assume the size of the bars is proportional to the values."
The X-axis is important too, and Gaslowitz cautions it can be manipulated just as easily.
2. Ask yourself: What does the visualization actually show, and does it make any sense?
The economic cost of mass incarceration is more than $1 trillion dollars. This chart, explores how many prison cells it would take to store $1 trillion in cash. Volume is not a very useful measure in this case, but it's presented in bold, block letters as if it's vital information. Don't be fooled by typography or because they showed their work.
Image via WTFviz/Tumblr.
3. Cherry-picking: Great for fruit pies, less so for graphs and charts.
When a group or individual uses a graph to make a point, they may pick and choose which information to include. It's called cherry-picking, and it can lead to wholly inaccurate charts.
The graph from the National Weather Service makes it look like 2015 had the second highest number of consecutive days without rain. It didn't. The second longest streak was 62 days in 1984. But this graph only shows the record year and the past five years for comparison. That's not to say it intended to deceive, but that's a consequence of limiting the data.
4. In life and in graphs, you can't ignore context.
Gaslowitz shared two graphs on ocean temperature. The first showed the changes in temperature over time, but that doesn't capture the full story because even a half-degree rise can have a major effect.

Showing the increase or decrease in ocean temperature by the amount of increase is a more appropriate context.

5. Go straight to the source, and look at it right in its source eyes.
Take a look at where you're getting the information from. Is it a trusted, reliable news source with fact-checkers and editorial standards? Is it an advertisement or paid study? The source matters. If you're unsure, try to find the data somewhere else to double check, especially before you share it.




A Generation Jones teenager poses in her room.Image via Wikmedia Commons
An office kitchen.via
An angry man eating spaghetti.via 



An Irish woman went to the doctor for a routine eye exam. She left with bright neon green eyes.
It's not easy seeing green.
Did she get superpowers?
Going to the eye doctor can be a hassle and a pain. It's not just the routine issues and inconveniences that come along when making a doctor appointment, but sometimes the various devices being used to check your eyes' health feel invasive and uncomfortable. But at least at the end of the appointment, most of us don't look like we're turning into The Incredible Hulk. That wasn't the case for one Irish woman.
Photographer Margerita B. Wargola was just going in for a routine eye exam at the hospital but ended up leaving with her eyes a shocking, bright neon green.
At the doctor's office, the nurse practitioner was prepping Wargola for a test with a machine that Wargola had experienced before. Before the test started, Wargola presumed the nurse had dropped some saline into her eyes, as they were feeling dry. After she blinked, everything went yellow.
Wargola and the nurse initially panicked. Neither knew what was going on as Wargola suddenly had yellow vision and radioactive-looking green eyes. After the initial shock, both realized the issue: the nurse forgot to ask Wargola to remove her contact lenses before putting contrast drops in her eyes for the exam. Wargola and the nurse quickly removed the lenses from her eyes and washed them thoroughly with saline. Fortunately, Wargola's eyes were unharmed. Unfortunately, her contacts were permanently stained and she didn't bring a spare pair.
- YouTube youtube.com
Since she has poor vision, Wargola was forced to drive herself home after the eye exam wearing the neon-green contact lenses that make her look like a member of the Green Lantern Corps. She couldn't help but laugh at her predicament and recorded a video explaining it all on social media. Since then, her video has sparked a couple Reddit threads and collected a bunch of comments on Instagram:
“But the REAL question is: do you now have X-Ray vision?”
“You can just say you're a superhero.”
“I would make a few stops on the way home just to freak some people out!”
“I would have lived it up! Grab a coffee, do grocery shopping, walk around a shopping center.”
“This one would pair well with that girl who ate something with turmeric with her invisalign on and walked around Paris smiling at people with seemingly BRIGHT YELLOW TEETH.”
“I would save those for fancy special occasions! WOW!”
“Every time I'd stop I'd turn slowly and stare at the person in the car next to me.”
“Keep them. Tell people what to do. They’ll do your bidding.”
In a follow-up Instagram video, Wargola showed her followers that she was safe at home with normal eyes, showing that the damaged contact lenses were so stained that they turned the saline solution in her contacts case into a bright Gatorade yellow. She wasn't mad at the nurse and, in fact, plans on keeping the lenses to wear on St. Patrick's Day or some other special occasion.
While no harm was done and a good laugh was had, it's still best for doctors, nurses, and patients alike to double-check and ask or tell if contact lenses are being worn before each eye test. If not, there might be more than ultra-green eyes to worry about.