Question

(2,4) (x,8) slope = -2 what is x?

Answer 1

X is equal to zero because the equation for slope is the change in Y/change in x.
If we plug in the known values and set the equation equal to -2, x is 0. (4-8/2-x=-2 , 4-8/2-0= -4/2 or -2).

You can ask me any questions if my explanation what confusing haha.

Answer 2

x = 0

Explanation:

The formula of a slope:

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

We have:

the points (2, 4) and (x, 8)

the slope m = -2

Substitute:

`-2=(8-4)/(x-2)`

`-2=(4)/(x-2)`

`(-2)/(1)=(4)/(x-2)` cross multiply

`-2(x-2)=(1)(4)`

`-2(x-2)=4` divide both sides by (-2)

`(-2(x-2))/(-2)=(4)/(-2)`

`x-2=-2` add 2 to both sides

`x-2+2=-2+2`

`x=0`