Algebra-1

The function that describes the situation where a subscription service charges a flat fee of $15 per month plus $1 for each extra item rented is linear.

Here’s why:

Linear Function: In this case, the total cost is determined by adding a fixed amount for the subscription plus a variable amount based on the number of extra items rented. The total cost increases linearly with the number of extra items because the cost per item is constant.

The general form of a linear function is:

y = mx + b

where:

m is the rate of change (in this case, $1 per extra item),

x is the number of...