Chapter 3 Review
Student Council is selling cookies and brownies.
Cookies cost $0.25 each and brownies cost $0.50 each.
They need to make $100.
Write an equation to model this situation.
Let x = # of cookies they sell and y = # of brownies they sell
Calculate the x-intercept and y-intercept
then graph the function.
400
# of Brownies sold
300
200
100
20
20
100
200
300
# of Cookies Sold
Explain, specifically, what the x-intercept means in
regards to the bake sale.
400
Determine whether each equation is a linear equation.
If yes, write the equation in standard form.
6x - 7y + 5 = 2
xy + 3 = 17
Calculate the x-intercept of 5x - 2y = 20
Calculate the y-intercept of 5x - 2y = 20
Now use the intercepts to graph the function 5x - 2y = 20
Solve
7x + 2 = 4x -10 by graphing
Determine whether the tables below represent linear
functions. Explain how you know without graphing the points.
x
4
y
-10
5
-15
6
-20
7
-25
8
-30
x
4
y
-10
5
-15
6
-21
7
-28
8
-36
Find the rate of change represented in the table:
x
y
3
7
5
8
7
9
9
10
11
11
Calculate the slope of the line
passing through each pair of points
( 3, -4) and (-5, -7)
(8, -2) and (8, 5)
(10, -4) and (3, -4)
Write an equation for the nth term of the sequence:
-7, -9, -11, -13, -15
Use the table below that shows the amount of money
Caroline earns while babysitting
hours
1
amount ($) 5
3
15
4
20
8
40
Write an equation in function notation for the
relationship between hours worked and amount paid.
How much will Caroline get paid
for 10 hours of babysitting?
Use the table below that shows the amount of money
Deb earns while babysitting
hours
1
amount ($) 8
3
18
4
23
7
38
9
48
Write an equation in function notation for the
relationship between hours worked and amount paid.
How much will Deb get paid
for 12 hours of babysitting?
Write an equation in function notation for the relation: