Question

Julie drove 442 miles in 6.5 hours and 612 in 9 hours. What is the constant rate of change? a) 29 miles per hour b) 31 miles per hour c) 32 miles per hour d) 33 miles per hour

Answer 1

m = (612 - 442)/(9 - 6.5) = 170/2.5 = 68 mph

Answer 2

Explanation:

Rate of change = total distance travelled / total time.

Total distance = 442 + 612 = 1054 miles.

Total time taken = 6.5 + 9 = 15.6 hours.

So, rate of change = 1054 / 15.5

= 68 miles per hour.