Answer:
It would be in the $3.30 or lower zone
Step-by-step explanation:

Solution ~
or it can also be expressed as ~
Part A: This data does represent a function because no value of x is repeated.
Part B: If x = 6 for the relation f(x) = 7x - 15, then f(x) will equal 27. The function f(x) = 7x - 15 will have the greater value
Part C: If f(x) is equal to 6 then x will equal 3
Distance Rate times Time
320= R 5.25
R= 60.9
R= 61 mph