Name: ______________________
Class: __________________
AU3: HW #4 – Writing Equations
Date: __________________
1
Write an equation in point-slope form for the line through the given point with the given
slope.
12.
 2,3; m  1
13.
4,7 ; m  3
2
2
14.
6,2; m   4
3
15.
An ice cream shop is deciding how much to charge for a gallon of ice cream. The owner
observes that the average number of customers is a linear function of the cost of a gallon
of ice cream. The owner finds that when the cost is $2 the average number of customers
is 140, and when the cost is $8 the average number of customers is 92.
Write a linear function to model the relationship between the cost of a gallon of ice cream
and the average number of customers per day. Explain the meaning of the slope and the
y-intercept in the context of the problem.
3