Caleb made the given table to show the number of hours he works and the amounts he earns over a four-week period. Caleb’s Earnings Hours 12 15 18 21 Earnings (in dollars) 140 170 200 230 Which describes whether the relationship between the earnings and the number of hours represents a direct variation?
Answer
A
The earnings increase by 30 for every increase of 3 hours, so the earnings vary directly with the hours.
B
The earnings increase at a steady rate, so the earnings do not vary directly with the hours.
C
The ratios of earnings to hours are not the same each week, so the earnings do not vary directly with the hours.
D
He earns 20 more than 10 times the number of hours he works each week, so the earnings vary directly with the hours.