Find the unknown coordinate so that each ordered pair is a s

Find the unknown coordinate so that each ordered pair is a solution to the equation y = - 1/4 x + 8 a. (8, ?) b. (?, -4) a. Find the unknown coordinate. (8, ) b. Find the unknown coordinate. (, -4)

Solution

y = -x/4 +8

a) (x, y) = (8, y)

y = -8/4 +8 = -2 +8 = 6

(8, 6)

b) -4 = -x/4 +8

-x/4 = -12

x = 48

(48, -4)