Question 1164911
the domain is the value of x can be any integer greater than zero.
the value of x can't be negative since the number of digital prints can't be negative.
the value of x can't be 0 since since you don't go into a store to make 0 prints.


the range is the value of y greater than or equal to .13 in increments of .13.


the relationship between x and y is a function because each and every value of x results in one and only one distinct value of y.


in function notation, y = .13 * x is written as f(x) = .13 * x


f(5) replaces x with 5 to get f(5) = .13 * 5 = .65
it tells you to evaluate the function when x = 5.
x = 5 means you printed 5 digital pictures.
f(5) means it cost you 65 cents to print 5 digital pictures.



f(12) replaces x with 12 to get f(12) = .13 * 12 = 1.56
it tells you to evaluate the function when x = 12.
x = 12 means you printed 12 digital pictures.
f(12) means it cost you 1 dollar and 56 cents to print 12 digital pictures.


since x had to be an integer, it was impossible to get a value of y that was not in increments of .13
in fact, the number of increments of .13 is given by the value of x.