Constant of Proportionality and Scale Drawings

If the actual width of the backyard is 49 feet, how wide is it in the drawing?

• 14 in

• 7 in

• 42 in

• 56 in

If the pole measures 12 inches, how tall is the actual pole?

• 16 feet

• 3 feet

• 48 feet

• 9 feet

In a picture, the coffee mug uses a scale of ½ inch = 3 cm. Find the actual length of the 2 inch coffee mug.

• 24 cm

• 6 cm

• 1.5 cm

• 12 cm

On a map, Denver to Chicago is 3 inches.

If the scale is 1 inch = 300 miles, find the actual distance.

• 300 miles

• 1000 miles

• 900 miles

• 600 miles

• A

• B

• C

• D

• 22.5
• 24
• 37.5
• 40

• A

• B

• C

• D

solve

Mathematical Equivalence

ON

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.

What is the constant of proportionality?

• $3

• $4

• $2

• $9