Question

@Maizetycorn HELP with my previous questions pleaseeee! URGENT

A line has a slope of -7 and includes the points (-1,-8) and (z,6). What is the value of z?
z=

Answer 1

z=-3

Explanation:

The given line has slope m=-7.

The line passes through (-1,-8) and (z,6).

We use the slope formula:

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

We substitute
`x_1=-1`,
`y_1=-8`,
`x_2=z` ,
`y_2=6` and
`m=-7` to get:

`-7=(6--8)/(z--1)`

`-7=(6+8)/(z+1)`

`-7=(14)/(z+1)`

`-7(z+1)=14`

Expand
`-7z-7=14`

`-7z=14+7`

`-7z=21`

`z=-3`