Question

Two brothers, Lionel and Marcus, are each a different distance from their home. They start driving toward home at the same time, but at different rates. Assume the distances are changing linearly. What was the difference, in miles, of their initial distances from home? Do not indude units in your answer.

Answer 1

Explanation:

Find the slope is found for each brother.

Lionel: 70−1703−1=−50

Marcus: 60−1403−1=−40

Then use y=mx+b

m= -50

170=-50(1)+b

b=220

y=-50x+220

m= - 40

140=-40(1) + b

b=180

y= -40x+180

220mi−180mi=40mi