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Name_________________________________________________________ Chapter Date __________ Quiz Prep Classwork For use after Section 4.3 4 Graph the linear equation. You can use the graph given or separate coordinate grids that we have available. 1 x y = x -1 y = - -1 3 2 1. xly 2. xly Find the slope of the line. 3. 4. Copyright © Big Ideas Learning, LLC All rights reserved. Big Ideas Math Blue Assessment Book 41 5.The cost y (in dollars) for x pounds of deli meat is represented by the equation y = 2.5x. Graph the equation and interpret the slope. 6.The amount y (in cups) of flour is proportional to the number x of eggs in a recipe. The recipe calls for 8 cups of flour for every 2 eggs. a. Write an equation that represents the situation. b. Interpret the slope. c. How many eggs are included when the recipe uses 16 cups of flour? 42 Big Ideas Math Red Assessment Book Copyright © Big Ideas Learning, LLC All rights reserved. 7. The cost y (in dollars) to rent a lane at the bowling alley is proportional to the number x of hours that you rent the lane. It costs $18 to rent the lane for 2 hours. a. Write an equation that represents the situation. b. Interpret the slope. c. How much does it cost to rent the lane for 3 hours? Copyright © Big Ideas Learning, LLC All rights reserved. Big Ideas Math Blue Assessment Book 43 8. The gasoline y (in fluid ounces) is proportional to the number of fluid ounces of oil x used to run a 2-cycle motor. It takes 45 fluid ounces of gasoline for 9 fluid ounces of oil. a) Write an equation that represents the situation. b) How much gasoline (in fluid ounces) is needed for 15 fluid ounces of oil? 9. The number of pancakes y is proportional to the cups of pancake mix x that is used to make the pancake batter. The pancake batter will make 20 pancakes when 5 cups of pancake mix is used. a) Write an equation that represents the situation. b) How many pancakes are made when 4 cups of pancake mix are used in the pancake batter? 44 Big Ideas Math Red Assessment Book Copyright © Big Ideas Learning, LLC All rights reserved. 10. The toll charge y (in dollars) is proportional to the number of miles x traveled on the interstate. It cost $8 to travel 80 miles. a) Write an equation that represents the situation. b) How much does the toll charge cost (in dollars) when you travel 200 miles? Tell whether x and y are in a proportional relationship. Explain your reasoning. If so, write an equation that represents the relationship. 11. 12. Copyright © Big Ideas Learning, LLC All rights reserved. Big Ideas Math Blue Assessment Book 45