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Coordinates and Graphs Videos 64 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
The video will show you how to plot points in 3D using the axes of the 3D coordinate system. Make sure you're wearing your special glasses for this...
When graphing inequalities, you graph the line, shade the corresponding side, and plug in the point. The end!
CAHSEE Math 5.1 Algebra and Functions 295 Views
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Description:
Algebra and Functions: Drill Set 5, Problem 1. If this equation was graphed on coordinate axes, the graph would look like which of the following lines?
Transcript
- 00:02
And here's a shmoopy question for your brain.
- 00:05
If the linear equation y = mx + b, with m = -0.2, was graphed on coordinate axes...
- 00:12
...the graph would look like which of the following lines?
- 00:16
And here are the potential answers -- all graphs...
- 00:19
Try it yourself first.
Full Transcript
- 00:20
Hit pause.
- 00:23
So... there's really one thing this question is asking: Do you know m?
- 00:27
Yeah, m. The letter.
- 00:30
Well, it means slope in our little graphy world here -- it is
- 00:34
a calculation of rise divided by run...
- 00:37
...and there are really 4 prime time versions of m.
- 00:40
If m is flat, like this, slope is 0.
- 00:44
If m is vertical like this, slope is undefined -- yeah, you can't divide by 0.
- 00:49
If m is shaped upwards like this, m is positive.
- 00:52
And if m is shaped downwards like this, m is negative.
- 00:55
In this case m is negative so there's only one graph it could... be. which is... B. Done.
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