yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Interpreting plotted points


2m read
·Nov 11, 2024

The graph below shows the relationship between hours of exercise and hours of screen time for a group of five friends on Thursday. So if we look over here, we can see that here on this horizontal axis, when we're going from the left to right, it says hours of exercise: so half an hour, 1 hour, 1 and a half hours, 2 hours, 2 and 1 half hours.

Then here it shows hours of screen time. For example, it looks like Le Yang did zero hours of exercise, did no exercise, and spent seven hours in front of a screen. Not something that I would recommend. It looks like Cava spent half an hour; had half an hour of exercise on Thursday—this is all describing what happens on Thursday—and had 5 and a half hours of screen time. You see that right over there?

We could keep going with all the other data points, but let's see what they're asking us. What is the meaning of the point marked Maxime? I think that's how I would pronounce that. So, Maxime is right over here, and it looks like this is the point (1, 4) because our horizontal coordinate right over here is 1, and then our vertical coordinate is 4.

So point (1, 4) is the hours of exercise, so Maxime's exercise is 1 hour—1 hour of exercise—and they spend 4 hours in front of a screen on that Thursday: 4 hours screen time.

All right, so let's see which of these choices say that. Let's see, it is: Maxime had 1 hour of exercise and 4 hours of screen time. Yep, this looks exactly right! If you just wanted to check the other ones: Maxime had 2 hours of exercise and 8 hours of screen time—that would put them way up here, and that's not where the point was, so we'd rule that out.

Maxime had 4 hours of exercise and 1 hour of screen time. Four hours of exercise is not even on this; we’d have to go off the screen, so we’d rule that one out. Maxime had 5 hours of exercise—once again, that’s not even on the screen here, so that is so we can rule all of them out.

This third choice, they’re actually trying to confuse you because they’re swapping the hours of exercise and screen time: Maxime has 1 hour of exercise, 4 hours of screen time—not 4 hours of exercise and 1 hour of screen time!

More Articles

View All
Why Mosquitoes Bite Some People More Than Others
Are you the person in the group who’s always getting bitten by mosquitoes? Because I certainly am, and science has shown that this is a thing—that mosquitoes are more attracted to some people than others. And the reason for that is at least partially gene…
Cathie Wood: The Top ‘Wealth Destroyer’ of the Decade
So, I love looking into the world’s best investors, right? It’s kind of my thing here on the channel. But one of the most requested videos I get is to take a look into Kathy Wood and Arc Invest. This is a really interesting case because Kathy Wood was onc…
Homeroom with Sal, Carol Dweck, PhD, & Vicky Colbert - Tuesday, May 25
Hi everyone, Sal Khan here from Khan Academy. Welcome to the Homeroom with Sal live stream. We have a very exciting show today. We have, I would say, two mega figures in the world of education. We have Carol Dweck, a professor at Stanford. You all might …
Finding Fourier coefficients for square wave
So this could very well be an exciting video because we started with this idea of a 4A series that we could take a periodic function and represent it as an infinite sum of weighted cosines and sines. We use that idea to say, well, can we find formulas for…
Thank you to Kenn Ricci of Flexjet
2 months ago, I was sitting at my desk when I got a phone call. It was Flexjet chairman Ken Ricky. “Congratulations, you’ve been selected to be an honorary for The Living Legends of Aviation award!” Oh my, I was shocked! This is the last thing I was expec…
Worked examples: slope-intercept intro | Mathematics I | High School Math | Khan Academy
Do some practice examples from our intro to slope-intercept exercise. What is the slope of y is equal to negative 4x minus 3? So, you might already recognize this is in slope-intercept form. Just as a reminder, slope-intercept form is y is equal to mx p…