Question

Each day, Yumiko exercises by first doing sit-ups and then running. Use her data and the trend line y = 9x + 5 to estimate Yumiko’s exercise time if she runs 5 mi.

Estimate: about ______ minutes

Answer 1

50

Explanation:

Given the trend line equation :

y = 9x + 5

Exercise time if she runs 5 miles :

From the trend line equation :

y = exercise time

x = miles ran

If she runs 5 miles ; then x = 5

y = 9(5) + 5

y = 45 + 5

y = 50