Proportions
Ratios and Rates
Vocabulary
Scale Factors
Scale Models
100

Does the pair of ratios form a proportion: 1.5/5.0 = 3 / 9?

What is no?

100
Express in simplest form: $3 for 6 cans of beans.
What is $1 for 2 cans of beans?
100
Ratio
What is a comparison of two numbers by division?
100

The scale factor of 1 cm to meters.

What is 1 to 100?

100

The scale of a picture to an actual building is 1 in = 3 ft. How tall is the building if the drawing is 24 inches tall?

What is 72 feet?

200
Solve: 16 / 7 = 4.8 / x
What is 2.1?
200
Express as a unit rate: 75 meters in 15 seconds.
What is 5 meters per second?
200
Unit Rate
What is a rate that is simplified so that it has a denominator of 1?
200

Scale factor of 22 mm to 11 cm.

What is 1 to 5?

200

The scale of a drawing of a garden is 1/4 cm = 2 m. The garden is 8 m wide. How wide is the drawing?

What is 1 cm?

300
Solve: 3 / x = 12 / 6
What is x = 1.5?
300

Convert 100 meters to kilometers

What is 0.1 Km?

300
Proportion
What is a statement of equality of two ratios?
300

Scale Factor of 1/2 cm to 1 m.

What is 1 to 200?

300

If a scale has a scale factor of 1/18, which could be the correct scale? a) 3 cm = 6 m; b) 3 cm = 0.54 m; c) 6 cm = 108 cm; d) 6 cm = 10 m.

What is b) 3 cm = 0.54 m ?

400
Use a proportion to solve: 12 pencils for $4, 144 pencils for $x.
What is $48?
400

The simplified form of the ratio 16 m : 500 cm

What is 16:5?

400
Scale Drawing or Scale Model
What is a drawing or model that is used to represent an object that is too large or too small to be drawn or built at actual size?
400

The scale factor of a model is 1 to 3. The scale is 8 mm = cm

What is 2.4 cm?

400

On a scale model, the highest point is 6 m tall. If the actual height of that point is 0.144 km, what is the scale of the model?

What is 1 : 24 ?

500

Solve: 6.5 / 1.3 = m / 5.2

What is 26?

500

Express as a unit rate: 331.5 pages in 8.5 weeks.

What is 39 pages per week?

500
Scale
What is a ratio that gives the relationship between the measurements on the drawing or model and the measurements of the real object?
500

The scale factor of 5 cm = 2 m.

What is 1 to 40?

500

A model is built with a 1:16 scale. On the model, the width is 5.8 cm. What is the actual width?

What is 92.8 cm?

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