SOLUTION: Will you help me with this? The cost of a school banquet is $75 plus $12 for each person attending. What linear function models this problem for the cost of 60 people?

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What I think you really want is a linear function that models the cost for ANY number of people, and then use that model to calculate the cost for 60 people.

Let x be the number of people. Each one costs $12, so the cost for the people is 12x. But there is also the $75 that is charged whether anyone attends or not, so:

, where C is the cost function and x is the number of people who attend.

Now, you want to know the cost for 60 people. So just evaluate , which is to say, substitute 60 in place of x in your model and do the arithmetic.