Answer:
c. y=x^2+2x-7
Step-by-step explanation:
A linear function has the highest power of 1 (x)
A quadratic has the highest power of 2 (x^2)
A cubic has the highest power of 3 ( x^2)
a. y=x+9 linear
b. y=2x-15 linear
c. y=x^2+2x-7 quadratic
d. y=x^3-x^2 cubic
Itś reduce to 1/3
@CristianoRonaldo
That doesn't make any sense there can't be 17 tens it has to be 5 ones 7 tens 1 hundred and3 thousand so it would = 3175