2
at
? = 2
? Circle the correct
graph below.
A
B
C
D
5.
Find the equation of the line that goes through the points
(
2
3
,
1
2
)
and
(
5
3
,
−3
2
)
.

6.
Find the equation of the line that goes through the point
(0.3,2)
and is parallel to the line
? = −0.05? + 1
.
7.
A company’s cost structure for its manufacturing arm is as follows: they have fixed costs of $3500.00 per
week (fixed costs are the costs associated with producing 0 items a week); and variable cost of $45.00 per
item (variable costs are labor and materials costs). Create a linear cost function that outputs the cost in
dollars of producing
x
items a week.
8.
On 5/7/2015 the price of a gallon of gasoline was $2.16, and that price was increasing at a rate of $0.02 per
day. Based on this information what would be a good estimate of the price of a gallon of gasoline on
5/10/2015?

9.
Orange Inc. has just released the amazing
DriedFig
, a portable electronic device that is very popular. When
they price it at $250.00, they sell 224.5 thousand units a week. The marketing dept has found that if they
reduce the price by $25.00 a unit, then sales will increase by 6.2 thousand units a week.