Proportions and Scale

The two rectangles are scale drawings. What is the measurement of x?

• 21

• 1.25

• 20

• 4

Jamie made a scale drawing of his apartment building.  The building is 300 ft tall.  He wants his scale to be 1 inch : 10 ft.  How tall should his building be in his scale drawing?

• 25 inches

• 60 inches

• 1/30 inch

• 30 inches

Pam drew a scale drawing of a game room. She used the scale 1 inch : 2 feet. If the air hockey table is 5 inches in the drawing, how long is the actual air hockey table?

• 10 Feet

• 2.5 Feet

• 5 Feet

• 15 Feet

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

The scale of a model train is 1 inch to 13.5 feet. One of the cars of the model train is 5 inches long. What is the length, in feet, of the actual train car?

• 67.5

• 32.4

• 14.5

• 2.7

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.

Which table does NOT show a proportional relationship between x and y?

• A

• B

• C

• 672 inches

• 0.29 inches

• 3.4 inches

• 13.92 inches

Is this table proportional?

• Yes. The constant of proportionality is 0.35.

• Yes. The constant of proportionality is 0.25.

• No. The constant of proportionality is 0.35.

• No. There is no constant of proportionality.

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 2.50.

• No. There is a constant of proportionality of 3.