Boris is driving to Memphis. Suppose that the distance to his destination (in miles) is a linear function of his total driving time (in minutes). Boris has 58 miles to his destination after

Question

21 minutes of driving, and he has
42.6 miles to his destination after
43 minutes of driving. How many miles will he have to his destination after 59 minutes of driving?

Answer 1

y = mx+b

21m+b = 58
43m+b = 42.6

Solve for m and b, and then figure y when x=59.

Or, note that 22 minutes of driving covered 15.4 miles.

So, after 16 more minutes, he covers (16/22)(15.4) more miles. Subtract that from 42.6