Question

A window washer uses the proportional relationship y = kx to determine how long (y) it will take him to wash any number of windows (x). It takes the window washer 8 hours to wash 250 windows. What is the value of k

A) k = 242
B) k = 258
C) k = 0.032
D) k = 31.25

Answer 1

C.

By plugging in the numbers into the equation, 8 = 250(k), we can determine that 8 ÷ 250 = 0.032.