Question

Find an input that yields an output of 168 Y=-12x-72

Answer 1

The input value that yield an output of 168 is -20

Using the function given :

• y = -12x - 72

Output value given = 168

The output value of a function is the 'y' value. So we can rewrite our function as :

168 = -12x - 72

Now we solve for the input value, 'x'

168 = -12x - 72

168 + 72 = -12x -72 + 72

240 = -12x

x = 240/-12

x = -20

Therefore, the input value is -20