Question

A computer technician charges a fee of $50 to diagnose a problem and $70 per hour to fix it. Write an equation in slope-intercept form to represent this situation. Identify the initial value and the rate of change.
A. The initial value if $70 and the rate of change is $50.
B. The initial value is $50 and the rate of change is $70.
C. The rate of change is $120.
D. The initial value is $120.

Answer 1

Let x = hours to fix, y = total cost. The slope-intercept form is
y = 70x + 50.

Initial value (fixed diagnostic fee) = $50. Rate of change (cost per hour) = $70.
Answer: B.