Question

When asked to write a point-slope equation for a line passing through the points (-3, -5) and (2, 4), a student wrote y-4=-9/5(x-2) . How can he fix this to write the correct equation?

Answer 1

A). CHange the minus signtoplus signs
B). change the sign of the slope
C). this is correct do not change
D). distibute -9/5 toeach term in the parentheses

Answer 2

@butterflydreamer

Answer 3

Hello @autumnmarietyler1

Sorry for the late reply :-/

Let us first see what slope the students was supposed to have

slope = rise/run = (y2 - y1)/(x2 - x1)

so the slope in this case would be
4 - (-5) 4 + 5 9
---------- = --------- = ------
2 - (-3) 2 + 3 5

which is a positive slope
does the student have a positive slope as well?


I hope this helped!
If you have anymore questions feel free to tag me :) @sleepyhead314