Question

A line that includes the points (n, – 7) and ( – 3,3) has a slope of – 10. What is the value of n?

Answer 1

Explanation:

`m = (y_2 - y_1)/(x_2 - x_1)`

`- 10 = (3 - ( - 7))/( - 3 - n)`

`- 10( - 3 - n) = 10`

`30 + 10n = 10`

`10n = 10 - 30`

`10n = - 20`

`n = ( - 20)/(10)`

`n = - 2`