Unit 2: Ratios & Proportional Reasoning
Unit Rates, Constants of Proportionality, and Percentages
Determine rates, constants of proportionality, and percent changes.
1. A car travels 140 miles on 4 gallons of gasoline. What is the constant of proportionality in miles per gallon?
A) 28 mpgB) 35 mpgC) 40 mpgD) 56 mpg
2. A winter jacket originally priced at $60 is on sale for 25% off. The sale price before tax is $____.
3. If 4 identical spiral notebooks cost $9.00, write an equation relating total cost (c) to the number of notebooks (n).
4. Match each percent situation with its equivalent decimal multiplier:
| 15% increase | • | • | 0.85 |
| 15% decrease | • | • | 0.015 |
| 1.5% tax rate | • | • | 1.50 |
| 150% of an amount | • | • | 1.15 |
5. A bakery recipe requires 2.5 cups of flour to yield 12 muffins. How many cups of flour are needed to bake 30 muffins?
PREVIEW · mylessonkit.com
mylessonkit.com/store/apex-algebra-lab
mylessonkit.com/store/apex-algebra-lab
mylessonkit.com/store/apex-algebra-lab
preview · mylessonkit.com/store/apex-algebra-lab