Mathematical Equivalence

OFF

The profit a cell phone vendor earned, in dollars, is proportional to the

number of cellphones sold. This equation represents the proportional

relationship between the profit earned (p) and number of cellphones (c)

sold.

p = 24c

Enter the profit, in dollars, earned for each cell phone sold.

Mathematical Equivalence

ON

Three bags of flour and two bags of sugar weigh 48 pounds. Four

bags of flour weigh 48 pounds. All bags of flour weigh the same, and

all bags of sugar weigh the same. What is the ratio of the weight of a

bag of flour to a bag of sugar?

• 1:2

• 2:1

• 4:1

• 8:1

• cannot be determined

This table shows a proportional relationship between x and y. Select All equations represent the relationship between x and y.

Tags

CCSS.7.RP.A.2C

Katie buys a necklace for $12.50 plus a 8% tax. Sharon buys a

bracelet for $9 plus a 8% tax.

Enter the sum, in dollars, that Katie and Sharon paid, including tax.

Mathematical Equivalence

ON

Darius has a 30-ounce sports drink. He drinks 18 ounces.

Enter the percentage of ounces Darius has left of his sports drink.

(enter digits only. no %sign)

Mathematical Equivalence

ON

This graph shows the linear relationship between commission earned

(C) by a salesperson and number of sales he makes (S).Using the value for R, Select ALL

equations that represents the relationship between

the commission earned (c) and the number of sales (s

• C=8S

• S=8C

Tags

CCSS.8.EE.B.5

Why does this graph show a non-proportional relationship?

• Because it is proportional
• It goes through the origin
• It does not go through the origin
• It is a straight line

Which statement about this graph is most true?Select all that apply

• It is a proportional graph

• The cleaner uses 1 cup of vinegar to every 2 cups of cleaner
• The cleaner uses 2 cups of vinegar for every 4 cups of cleaner
• The cleaner uses 2 cups of vinegaar for 1 cup of cleaner

Which is true about the graph?

• The insurance company pays $10 for every $10 the patient pays, making the constant of proportionality 1

• The insurance company pays $30 for every $20 the patient pays, making the constant of proportionality ¹/₂