Question

what is the equation of the line that passes through (1,3) and (-2,-3)

Answer 1

can you find the slope first? then find the y intercept?

Answer 2

i suggest you plot the points and connect them with a line

Answer 3

but you can just use this . slope = (y2 - y1) / (x2 - x1)

Answer 4

so is the slope 2?

Answer 5

I don't know how to do any of this that why I needed help.

Answer 6

yep slope is 2, so have you ever seen this y = mx + b?

Answer 7

m is the slope
b is the y intercept

Answer 8

so can you plug the slope you found into that equation?

Answer 9

yea I know but what is the y intercept?

Answer 10

we are going to find that after you plug in the slope

Answer 11

so y=2?

Answer 12

y = 2x + b, 2 = m = slope

Answer 13

okay what do I do after that?

Answer 14

ok so we have some points on the line pick one of them to use

Answer 15

pick either one

Answer 16

(1,3)

Answer 17

ok so we have (1, 3) that is the point where x = 1 and y = 3, so lets plug 1 and 3 into this equation

y = 2x + b

Answer 18

so 1=b?

Answer 19

correct so now you have everything you need for the equation

y = 2x + 1

Answer 20

okay thankyou!

Answer 21

yw