Caleb made the table below to show the number of hours he works and the amounts he earns over a four-week period.Caleb’s EarningsHours12151821Earnings(in dollars)140170200230Which describes whether the relationship between the earnings and the number of hours represents a direct variation?
Answer
H
He earns 20 more than 10 times the number of hours he works each week, so the earnings vary directly with the hours.
T
The earnings increase by 30 for every increase of 3 hours, so the earnings vary directly with the hours.
T
The ratios of earnings to hours are not the same each week, so the earnings do not vary directly with the hours.
T
The earnings increase at a steady rate, so the earnings do not vary directly with the hours.