Name: ____________
Investigation 2 (unit 4)
A group of students were
planning a picnic for the 40
members of their homeroom.
They investigated prices for
food and drink at two stores
and listed their findings in a
table. Complete the table to
find the Unit Rate for each
item, then answer the questions
below. Use the unit rate to
answer the questions.
1. How much would it cost to make
40 hamburger patties with ground
beef purchased from Streamline?
Show your work.
2. How much would 40 hamburger
patties cost at Bulky’s? Show your
work.
Practice Quiz
Streamline Market- Food and Drink Prices
Item
Quantity
Cost
Cola
$1.99
Ground Beef
(for hamburgers
6 cans (12 oz
each)
1 pound (makes 4
hamburgers)
Hamburger Buns
8-count package
$1.49
Potato Chips
Small bag (1.5 oz)
$0.89
Unit Rate/
price for 1
$1.39
Bulky Store- Food and Drink Prices
Item
Quantity
Cost
Cola
A case of 24 cans
(12 oz each)
$6.99
Ground Beef
10 patties
(for hamburgers (1/4 pounds each)
$4.99
Hamburger Buns 12-count package
$2.09
Potato Chips
$6.99
Fun Pack
(8 1.5 oz bags)
Unit Rate/
price for 1
3. Which store offers the better buy for Potato Chips? Explain how you decided.
4. You need to purchase enough hamburger buns to make 40 sandwiches. Buns come in packages
of 8 or 12, depending where you shop. Which store offers the better buy for 40 buns? Explain
and show your work. Hint: Remember to use the unit rate, you should be splitting the packages.
5. The meal at the picnic will include the following items:
 One 12-ounce can of cola
 One hamburger and bun
 One small bag of potato chips (1.5-ounce bag)
Additional facts about the picnic are The school cafeteria donated mustard, ketchup,
relish, onions, paper plates and napkins.
 The students will buy each item at whichever
store has the best price.
 There are 40 people attending the picnic.
Use the table from question 1. How much should the
students charge each person in order to cover the food
expenses? Show how you determined the amount.
Item
Better
price for 1
Price
for 40
Cola
Hamburger
Bun
Potato Chips
6. Which graph represents the cost of hamburgers at Bulk’s store? Explain.
The answer is
Graph: _________
Hamburger (X) Cost (Y)
0
10
20
30
7. Match each equation with one of the graphs above. Explain how you made your match.
C = 0.35n matches graph: _______
C = 0.5n
matches graph: _________
8. Explain how you could use the graph or equation to determine the cost for a given number of
hamburgers.
Name: ___KEY______
Investigation 2 (unit 4)
A group of students were
planning a picnic for the 40
members of their homeroom.
They investigated prices for
food and drink at two stores
and listed their findings in a
table. Complete the table to
find the Unit Rate for each
item, then answer the questions
below. Use the unit rate to
answer the questions.
1. How much would it cost to make
40 hamburger patties with ground
beef purchased from Streamline?
Show your work.
$14
.35 x 40 = 14
2. How much would 40 hamburger
patties cost at Bulky’s? Show your
work.
$20
.50 x 40 = 20
Practice Quiz
Streamline Market- Food and Drink Prices
Item
Quantity
Cost
Unit Rate/
price for 1
Cola
$1.99
.33
Ground Beef
(for hamburgers
6 cans (12 oz
each)
1 pound (makes 4
hamburgers)
$1.39
.35
Hamburger Buns
8-count package
$1.49
.19
Potato Chips
Small bag (1.5 oz)
$0.89
.89
Bulky Store- Food and Drink Prices
Item
Quantity
Cost
Unit Rate/
price for 1
Cola
A case of 24 cans
(12 oz each)
$6.99
.29
Ground Beef
10 patties
(for hamburgers (1/4 pounds each)
$4.99
.50
Hamburger Buns 12-count package
$2.09
.17
Potato Chips
$6.99
.87
Fun Pack
(8- 1.5 oz bags)
3. Which store offers the better buy for Potato Chips? Explain how you decided.
Bulky: the cost of 87 cents is less than the cost of 89 cents
You want to pay less per package
4. You need to purchase enough hamburger buns to make 40 sandwiches. Buns come in packages
of 8 or 12, depending where you shop. Which store offers the better buy for 40 buns? Explain
and show your work. Hint: Remember to use the unit rate, you should be splitting the packages.
Bulky: the cost per bun is less. You want to pay 17 cents per bun and not 19 cents per bun
Because you can split the package, the amount per package is not important, the price for 1 bun
is the important factor.
5. The meal at the picnic will include the following items:
 One 12-ounce can of cola
 One hamburger and bun
 One small bag of potato chips (1.5-ounce bag)
Additional facts about the picnic are The school cafeteria donated mustard, ketchup,
Item
Better
relish, onions, paper plates and napkins.
price for 1
 The students will buy each item at whichever
Cola
.29
store has the best price.
 There are 40 people attending the picnic.
Hamburger
.35
Use the table from question 1. How much should the
Bun
.17
students charge each person in order to cover the food
Potato Chips .87
expenses? Show how you determined the amount.
You can buy from any store, so use the store that has
the smallest unit rate (per one)
Total for 40 people: $67.20
Price per person: $1.68
6. Which graph represents the cost of hamburgers at Bulk’s store? Explain.
Price
for 40
11.60
14.00
6.80
34.80
The answer is
Graph: __B____
Hamburger Cost (Y)
(X)
0
0
10
4.99 or 5
20
9.90 or 10
30
15.00
7. Match each equation with one of the graphs above. Explain how you made your match.
C = 0.35n matches graph: __A___
C = 0.5n matches graph: ____B_____
8. Explain how you could use the graph or equation to determine the cost for a given number of
hamburgers.
You can use substitution to help determine the missing number or in the graph you can find the
unit rate or price per 1