Alll are integers since they are defined exactly.
Part A
The table does represent y as a function of x because each input (values of x) related to exactly one output. Refer to the diagram below.
Part B
We have
f(x) = 925x + 1000
f(24) = 925 (24) + 1000
f(24) = 23200
f(24) represent the value of renting for 24 months
What are you trying to solve for?
Set up ratio problem
.2 oz butter / (1/15) lb jelly = x / 1 lb jelly
Then cross multiply the stuff opposite each other in the fractions... set it up as a multiplication problem
.2 × 1 = (1/15) × x
.2 = (1/15)x
Multiply both sides of equation by 15 to clear out the (1/15) fraction and get x
x = 3