Answer and working out attached below. Hope this helps.
Here is the answer in exact form or decimal form.
The step shown is an addition in which 10x is added to both sides of the equation. The property of equality is:
C. Addition Property of Equality
No x=5 since 5 is the input. The input is always equal to x and the output is always equal to y. So x=5 and y=x+5
(2,-2)
(7,8)
-2-8 = -10
——. ——-
2-7. -5
-10/5 = 2/1
2/1 =
2
Slope is 2