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Mathematics 21 Online
iYuko (iyuko):

HELP HELP HELP!

iYuko (iyuko):

http://prntscr.com/70a4gp

OpenStudy (anonymous):

Iggy

iYuko (iyuko):

@iGreen

iYuko (iyuko):

@ganeshie8

iYuko (iyuko):

@TheSmartOne

iYuko (iyuko):

@YanaSidlinskiy

OpenStudy (igreen):

Rate of Change = Slope

iYuko (iyuko):

Ohhhhhh

OpenStudy (igreen):

6x - 3y = 12 Solve for 'y', do you know how?

iYuko (iyuko):

No

OpenStudy (igreen):

Okay, first, subtract 6x to both sides, do you know how?

iYuko (iyuko):

Yea

OpenStudy (igreen):

Okay, tell me what you get

iYuko (iyuko):

-3y=12-6x

OpenStudy (igreen):

Yes, now divide -3 to both sides

iYuko (iyuko):

y=-4+2

iYuko (iyuko):

y=-2?

OpenStudy (igreen):

That's 2x..

OpenStudy (igreen):

y = -4 + 2x or y = 2x - 4

OpenStudy (igreen):

Now it's in the form of y = mx + b, where 'm' is the slope..so what's the slope here?

iYuko (iyuko):

-4

iYuko (iyuko):

It's 2

OpenStudy (igreen):

Check again..it's y = 2x - 4

OpenStudy (igreen):

Yes, now move onto the next one.

OpenStudy (igreen):

y = 5x + 4 That's already in slope-intercept form, so what's the slope?

iYuko (iyuko):

So 2 is high or low?. 5

OpenStudy (igreen):

5 is correct. It's asking for the biggest slope. #1 has a slope of 2 #2 has a slope of 5 So far #2 is the biggest.

OpenStudy (igreen):

Now for C, take any two points and plug them into the slope formula.

iYuko (iyuko):

3

OpenStudy (igreen):

Let's take (1, 2) and (3, 8). \(\sf m = \dfrac{y_2-y_1}{x_2-x_1}\)

OpenStudy (igreen):

3 is correct.

OpenStudy (igreen):

Now take any two points for the graph for D to find the slope

iYuko (iyuko):

D is 4

iYuko (iyuko):

So B?

OpenStudy (igreen):

Yep, you got it..B is correct.

iYuko (iyuko):

Thank you.

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