Scale Proportion

A scale drawing of a house shows 9cm ×10cm. If 6cm=12 ft, what are the actual dimensions?

• 9ft x 10ft

• 1ft x 2ft

• 12ft x 6ft

• 18ft x 20ft

The scale of a map says that 6 cm represents 15 km. What distance on the map represents an actual distance of 6 kilometers?

Which proportion represents the problem?

The scale of a map says that 6 cm represents 15 km.
What is the actual number of kilometers that is represented by 16 cm on the map?

Select the correct proportion that represents the problem

Sharon is decreasing the size of a diagram of a leaf that is 30 centimeters long by 10 centimeters wide. If the reduced diagram is 4 centimeters wide, how long will it be? Select the proportion that represents this problem

Is this table proportional?

• Yes. The constant of proportionality is 3.

• No. There is not a constant of proportionality.

• Yes. The constant of proportionality is 1/3.

• No. The constant of proportionality is 3.

Determine if the following pairs of quantities are proportional: (2, 3), (4, 6), (6, 9).

• Yes

• No

Whittemore Park Middle School is 30 feet tall. A 5 inch tall scale model of the school was made by the art club. What is the scale of the model?

• one inch = 6 feet

• one inch = 6 inches

• one inch = 72 inches

You can buy 4 tickets for $75 or 5 tickets for $94. Are the costs proportional?

• Yes

• No

How do you know whether two quantities x and y are proportional?

• Every sum x + y is the same for related pairs of x and y.

• Every x term is a multiple of the previous term.

• Every difference x – y is the same for related pairs of x and y.

Answer explanation

Proportional relationships are equivalent ratios.

Tags

CCSS.MATH.CONTENT.7.RP.A.2.a

• Yes

• No