Question

Find the equation of a line with the given points. (Put your answers in the form y = mx + b.)

(1, -5)
(5, -1)

Answer 1

First find m (the slope) by subtracting the 1st point from the 2nd and then use point one to fill in for y1 and x1 when putting it in the form y=mx+b

Answer 2

slope,m = change in y /change in x = (y2 -y1)/(x2 - x1) given two points on the line
(x1, y1) and (x2, y2)
using either of the points and using y = mx + b find b
write the equation of the line y = mx + b for any point (x, y)

Answer 3

do you need me to check your work?

Answer 4

y=-1x+4?

Answer 5

m = -5--1/1-5= 1

Answer 6

no

Answer 7

-5 = 1(1) + b
-5 -1 = b = -6
y = x -6

check with point 2
-1 = 5 -6 = -1

Answer 8

got it?

Answer 9

you had calculated the slope wrong.
try and make it a practice to check your work.
with your equation y = -x + 4 using (1, -5)
y = -5 -x + 4 = -1 + 4= 3
-5 not = 3 so you would see you have an error