It takes you 4 hours to driving 180 miles .explain how to use mental math to find your average speed .then, explain how your method is related to the formula d=rt

To find your average speed, divide 180 by 4 which is 45.
Formula:
Plug the number into the equation
180 is d (distance)
4 is t (time
So it would be 180=r•4
1) get r by itself so divide 4 to both sides
2) 180/4 = r
3) 45 = r

The equation of the line: y = 2x - 3

Put the coordinates of the points to the equation and check the equality:

(0, 3) → x = 0, y = 3

L = 3, R = 2(0) - 3 = -3

L ≠ R   INCORRECT  :(

(1, -1) → x = 1, y = -1

L = -1, R = 2(1) - 3 = 2 - 3 = -1

L = R   CORRECT :)

(-1, 4) → x = -1, y = 4

L = 4, R = 2(-1) - 3 = -2 - 3 = -5

L ≠ R   INCORRECT :(

(1, -1)