Question

A line has a slope of 5 and includes the points (–4,u) ( -7-,6)What is the value of u?

Answer 1

Apply the slope formula:

`m=(y2-y1)/(x2-x1)`

Given the points:

(x1,y1) = (-4, u)

(x2,y2) = (-7,-6)

m = slope = 5

Replacing:

`5=(6-u)/(-7-(-4))`

Solve for u

`5=(6-u)/(-7+4)`
`5=(6-u)/(-3)`
`5\cdot-3=6-u`
`-15=6-u`
`u=6+15`
`u=21`