Proportional Relationships
How can you tell if a graph shows a proportional relationship?
The line is straight, and it starts at the origin.
When multiplying two negative numbers, the answer will be ________.
Positive
What is the first thing you need to check to do before solving an equation?
Distributive Property
5 x 7
35
What was on the lunch menu on Friday?
Pizza, grilled cheese, and turkey and cheese sub
A recipe for a large batch of Chex Mix calls for 7 cups of Chex cereal and 5 cups of pretzels. If someone wanted to make a smaller batch with only 1 cup of Chex cereal, how many cups of pretzels would they need?
They would need 5/7 cups of pretzels.
-7 + 15 = ____
8
Solve the equation:
4x + 9 = 89
x = 20
9 x 6
54
What color shirt was Ms. Rheingans wearing on Friday?
Black
4 pounds of strawberries cost $5.60. What is the Constant of Proportionality in this relationship?
1.4
-9 - (-3) = ___
-6
Solve the equation
3x - 1.5 = 15
x = 5.5
12 x 7
84
Which house letter is Ms. Betka's room in?
House A
A school takes 55 kids on a field trip to a museum. It costs them $660 for admission. Write an equation using y = kx to represent the cost of admission per student to the museum.
y = 12x
75 / -5 = ___
-15
Solve the equation below:
6(x + 5) = 102
x = 12
11 x 12
132
What is the high temperature for today?
72 degrees
Jimmy John's charges $7.50 per sandwich and $3 for delivery. The delivery cost does not change with the number of sandwiches.
Is this a proportional relationship?
No, if a person is ordering delivery, their sandwich will always be at least $3. If this was made into a graph, the graph would not start at the origin.
-90 x -12 = ____
1,080
Solve the equation:
-3(x - 4) = 9
x = 1
196
What was the first movie we watched this year?
Ratatouille