Warm Up
Completion requirements
A. Ratios, Rates, and Proportion Review
Let's review what you already know about ratios, rates, and proportions.
| Ratios | Rates | Proportions |
|---|---|---|
| Ratio: a comparison of two values with the same unit. | Rate: a comparison of two values with different units. | A proportion exists when two rates or two ratios are equal. |
|
At the SPCA, cats outnumber dogs, 4 to 1. 4 to 1 = 4:1 = |
Minimum wage in Alberta is $9.75 for 1 hour of work time. $9.75 per hour = |
The ratios 8:2 and 4:1 are proportional because they are equivalent.
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|
Express the ratio of circles to triangles.
1 circle to 2 triangles or 1:2 |
Express travelling 400 km in 4 hours as a unit rate.
100 kilometres per hour or 100 km/hr |
The scale of a map uses 1 inch to represent 50 km. How far apart are two cities if they are 5 inches away on the map?
The cities are 250 km apart. |
= $9.75/h
