A polynomial function is represented by the data in the table.
x is 12, 15, 18, 21, 24
f(x) is 5 2/5, 6 3/5, 7 4/5, 9, 10 1/5
Choose the function represented by the table.
a. f(x)=2/5x + 3/5
b. f(x)=x - 6 3/5
c. f(x)= 1/5x^2 -2x + 3/5
d. f(x)=x^2 -10x - 18 3/5