Which of the following expressions represents "the product of 9 and a number, diminished by 7"? a)9n - 7 b)9n · 7 c)9(n + 7)

a) 9n-7

Step-by-step explanation:

Let the unknown number be represented by placeholder n.

Then the product of 9 and the number is represented by 9*n or 9n.

This value diminished by 7 corresponds to 9n - 7.

So the expression representing the required overall construct mathematically is given by 9n-7

Option b, 9n * 7 represents the product of 9n and 7.

Option c, 9(n+7) represents the product of 9 and (n incremented by 7).

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