Which phase is a description of the expression below 15-7n

[see below]

Step-by-step explanation:

-7n is getting subtracted from 15.

7n is 'the product of 7 and n'

15-7n could be 'the difference of fifteen and the product of 7 and n'. The correct answer choice would be the one closest to this/

Hope this helps.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value