Question

question 2 of 10
the graph shown corresponds to someone who makes ______.
graph: total earnings (y-axis: 0,15,30,45,60) vs hours worked (x-axis: 0,1,2,3,4), line through (0,0), (1,15), (2,30), (3,45), (4,60)
a. $30 a day
b. $15 an hour
c. $30 an hour
d. $15 a day

Explanation:

To determine the earnings rate, we analyze the graph. The x - axis is "Hours worked" and the y - axis is "Total earnings". At 1 hour of work (x = 1), the total earnings (y) is $15. The formula for the rate of earnings (hourly wage) is $\text{Hourly wage}=\frac{\text{Total earnings}}{\text{Hours worked}}$. When hours worked = 1, total earnings = 15, so the hourly wage is $\frac{15}{1}=15$ dollars per hour. Option A is incorrect as the graph shows earnings per hour, not per day. Option C would mean at 1 hour, earnings should be $30, but the graph shows $15. Option D is incorrect as it is per day and the graph shows per - hour earnings.

Answer:

B. $15 an hour