When a relation is drawn on an xy-plane, what is another name for the set of all x-values from its graph

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?

Which expression is equal to (f+g)(x)?