IM Grade 8 Unit 3 Check Your Readiness

Select all tables that represent proportional relationships.

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Answer explanation

For a table to be proportional, all non-zero values of y/x must be the same. This y/x value is called the constant of proportionality.

To mix a particular shade of purple paint, red paint and blue paint are mixed in the ratio 5:3. To make 20 gallons of this shade of purple paint, how many gallons of red and blue paint should be used?

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Answer explanation

12.5 gallons of red paint

7.5 gallons of blue paint

At one gas station, gas costs $5.75 per gallon. Write an equation that relates the total cost, C, to the number of gallons of gas purchased, G.

• G = 5.75c

• g/c = 5.75

• 1 x 5.75 = C

• C = 5.75g

Plot and label 3 different points with x-coordinate 3.

Then in a different color, sketch all points in the plane with an x-coordinate of 3 be?

On the coordinate plane, draw a line m that is a translation of line l.

On the coordinate plane, draw a line n that is a rotation of line l, using the origin as the center of rotation.

A store sells ice cream with assorted toppings.

They charge $3.00 for an ice cream, plus 50 cents per ounce of toppings.

How much does an ice cream cost with 4 ounces of toppings?

A store sells ice cream with assorted toppings.

They charge $3.00 for an ice cream, plus 50 cents per ounce of toppings.

How much does an ice cream cost with 11 ounces of toppings?

• $3

• $5.50

• $8.50

• $14

A store sells ice cream with assorted toppings. They charge $3.00 for an ice cream plus 50 cents per ounce of toppings.

If Elena's ice cream cost $1.50 more than Jada's ice cream,

how much more did Elena's toppings weigh?

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