Question

Write the equation of the line that passes through the points (–1, –4) and (2, 5).

Answer 1

First of all, you should find the slope. Do you know how to do that?

Answer 2

no, i dont

Answer 3

Do you know the formula?

Answer 4

y=mx+b?

Answer 5

That's the slope intercept form. To find the slope, you would need the formula Slope=(y-y1)/(x-x1)

Answer 6

ohh allright

Answer 7

Find the slope for me, will you?

Answer 8

i will

Answer 9

People get annoyed when I give out answers AND work so I try to make you do work too
-_-;;

Answer 10

lol its ok, the slope is -6

Answer 11

errr. I think the slope is 3. (5-(-4))/(2-(-1))?

Answer 12

Anyway, you know that the slope intercept form is y=mx+b with the x and y as coordinates, the b being a random constant, and the m being the slope.
So you know that the slope is 3 now, so you can plug it in the equation:
y=3x+b
You can then plug in on of your coordinates sets ( cuz you have two). I like to stay with positive numbers so I would do this:
5=3(2)+b
You do that equation to get b. Tell me what you get.

Answer 13

b=-1?

Answer 14

Yesss. Now what you do is keep your slope and b constant annd throw away the x and y because the x and y aren't constant, or else the equation would be of one point.
So you take y=mx+b and plug in m and b to get the equation of the line

Answer 15

thank you soooo much!<3

Answer 16

Just in case, what's your final answer?