Question

An auto mechanic charges $50 to diagnose a problem and $25 per hour to repair the problem. If x represents the total number of hours worked and y represents the total charges, which equation represents this situation?
y = 25x + 50
y = 50x + 25
y = 50x – 25
y = 25x – 50

Answer 1

y = 25x + 50

Reason: total charge = diagnostic fee ($50) + $25 per hour × number of hours (x), so y = 50 + 25x.