A. 20 mph
B. 35 mph
C. 70 mph
D. 100 mph

The answer is B. 35 mph

Speed is shown as distance/time

If you pick a point, for example 70 miles and divide it by the time which is 2 hours, then you get 35 miles per hour

true? is that what you're asking or do you mean something else?

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.