Part A
When x=1, x⁴ = 1⁴ = 1
Because y = 1, x⁴ = y.
When x=2, x⁴ = 2⁴ = 16
Because y = 16, x⁴ = y
y = x⁴ according to the given table.
For each given x, there is only one value of y, so it is a function.
Answer: The table represents a function of x.
Part B
f(x) = 17x + 50
where
x = hours to rent a truck
f(x) = cost in dollars
When x = 30 hours, f(30) = 17*30 + 50 = $560
Answer:
f(30) represents the cost in dollars to rent a truck for 30 hours.
The value of f(30) is $560.
