Scale With Proportions

Solve for x

• 2

• 90

Solve for x

• x=6

• x =1/6

• x = 7

• x=9

The pair of figures is similar. Find the missing side.

• x = 20

• x = 12

• x = 5

• x = 4

Using 2 in = 35 miles, solve:  The distance between Troy City and Ben City is 315 miles. How far apart are they on the map?

• 18 miles

• 18 inches

• 5512.5 inches

• 5512.5 miles

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.

Three slices of cheese cake have 4,200 calories. How many calories will 8 slices of the same cheese cake?

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

• A

• B

• C

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

• No

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.