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Mathematics 22 Online
OpenStudy (anonymous):

Find the slope of the line passing through the points (–1, 3) and (4, –7). 2 3/4 -4/3 -2

OpenStudy (anonymous):

there are a lot of questions like this on the OS look at them

OpenStudy (anonymous):

Will Fan and Metal

OpenStudy (anonymous):

Sara I wish I could Help But I can't Sorry D:

OpenStudy (anonymous):

Each point is written (x,y). The formula for the slope of a line is \[\frac{y _{2}-y _{1}}{x _{2}-x _{1}}\] The little two means it's the y or x-coordinate for the 2nd point you pick.

OpenStudy (anonymous):

Please tell me if you still don't understand

OpenStudy (anonymous):

Could u explain it a little more

OpenStudy (anonymous):

Take the x and y coordinates (first and second number in the parentheses) and plug them into the formula I gave you.

OpenStudy (kc_kennylau):

First point is (-1,3), second point is (4,-7). \[\Large\text{slope}=\frac{\text{change in y}}{\text{change in x}}\]

OpenStudy (anonymous):

ok what next

OpenStudy (kc_kennylau):

What is the \(\Large\text{change in y}\)?

OpenStudy (anonymous):

3?

OpenStudy (kc_kennylau):

No, that is the \(\Large\text{original y}\)

OpenStudy (anonymous):

I dont understand

OpenStudy (kc_kennylau):

Okay, when we go from the point (-1,3) to (4,-7)

OpenStudy (kc_kennylau):

The y-value changed from 3 to -7, right?

OpenStudy (anonymous):

yea

OpenStudy (kc_kennylau):

Does it make sense to you that \(\Large\text{change in y = new y - original y}\)?

OpenStudy (kc_kennylau):

Let's plug those numbers in

OpenStudy (anonymous):

ok thanks

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