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CAHSEE Math 5.1 Algebra and Functions 245 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?

Language:
English Language

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.

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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