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Mathematics 15 Online
OpenStudy (anonymous):

HELP!!! MEDAL + FAN! http://prntscr.com/63ozjg

OpenStudy (anonymous):

@harishk @arabpride @Bananas1234 @kohai @Callisto

OpenStudy (dan815):

rate of change: they are asking how y is changing with respect to x

OpenStudy (kohai):

Or slope, in other words

OpenStudy (anonymous):

I have no idea ;; It's a pretest... Any idea what the answer might be?

OpenStudy (dan815):

look at your graph, u see how if u pick a point on your line it gives u a x value and a y value

OpenStudy (anonymous):

Yeah I see..

OpenStudy (dan815):

they are asking you how is the value of the y coodinate changing when you change x

OpenStudy (anonymous):

Is it 2? :o

OpenStudy (dan815):

is the y coordinate ever changing?

OpenStudy (dan815):

label a couple of points on that line, and tell me what u notice

OpenStudy (anonymous):

uhh i don't.. think so?

OpenStudy (anonymous):

i dont know how to do that, im sorry. its very new to me, its a pretest & i dont think we're supposed to exactly know how to do this stuff quite yet..

OpenStudy (dan815):

its okay

OpenStudy (dan815):

so you saw how the y is not changing right

OpenStudy (anonymous):

it's also 4am where i am so.. im gonna fall asleep like any second now. i just wann aget the test over with ;;w;

OpenStudy (dan815):

this means the rate of 'change' is 0

OpenStudy (kohai):

Pretests just let you preview what you're going to learn and see what you already know

OpenStudy (dan815):

since there is change in the y value

OpenStudy (anonymous):

right,, okay.

OpenStudy (dan815):

there is no*

OpenStudy (anonymous):

i see.

OpenStudy (dan815):

to calculate your rate of change you would see the change in y for every change in x

OpenStudy (kohai):

y=mx+b where m is slope. You can easily find the slope on the equation. To find the "how much more" part, you subtract them..

OpenStudy (dan815):

if you have 2 points x1,y1 and x2,y2 (y2-y1)/(x2-x1)

OpenStudy (kohai):

Dan's way is optimal for when your slopes aren't nice and clean like this problem, you should memorize the formula

OpenStudy (anonymous):

Okay ^-^

OpenStudy (anonymous):

do you have any idea what the answer might be? im really so tired. ive been working for like 3-4 hours straight now and i wanted to get this wrapped up quickly so i dont have to worry about being behind..

OpenStudy (kohai):

The slope of function 1 is 0 because it's a straight line, it's never increasing or decreasing. If y=mx+b where m is your slope is 2 (y=2x+7), you subtract 0 and 2 to get the "how much more" ---- that's if I'm seeing this correctly

OpenStudy (anonymous):

0-2? then it would be.. uh, 2? am i right?

OpenStudy (kohai):

Yeah that's what I'm thinking. If I'm wrong someone feel free to jump in, but that's what I think the question is asking

OpenStudy (kohai):

I think it would be 2-0 though

OpenStudy (anonymous):

alright !! thank you for your help.,

OpenStudy (kohai):

Good luck on the pre-test, sleep well

OpenStudy (anonymous):

thanks ^^

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