Open Up Resources, Unit 3 8th Grade Math, Mid-Unit Assessment
The difference between a proportional relationship and a linear relationship is...
Write an equation that shows the relationship between grams of honey and grams of salt for a bakery recipe.
salt | honey
10 g | 14 g
25 g | 35 g
Olivia sold water bottles over four days. If the quantities are proportional, what is the constant of proportionality?
Just write the number.
The graph below represents the number of balls thrown over time. What is the constant of proportionality?
Hint: Pay attention to the scale!
Just write the number for your answer.
Three runners are training for a marathon. One day, they all run about ten miles, each at their own constant speed.
This is the graph of Runner #1's pace.
How long in minutes does it take Runner #1 to run 1 mile?
Hint: Pay attention to the axes!
Just write the number for your answer.
Three runners are training for a marathon. One day, they all run about ten miles, each at their own constant speed.
The equation that relates Runner #2’s distance (in miles) with time (in minutes) is t = 6.75d.
How long in minutes does it take Runner #2 to run 1 mile?
Just write the number for your answer.
Three runners are training for a marathon. One day, they all run about ten miles, each at their own constant speed.
Runner #3's information is in the table:
How long in minutes does it take Runner #3 to run 1 mile?
Just write the number for your answer.
Which of the three runners has the fastest pace?
A "U-Pick" Blueberry farm costs $12 to enter.
Two pounds of blueberries costs $20.
Which of these graphs shows the relationship between what a visitor pays and how many pounds of blueberries they purchase?
Write the equation of the lne shown to the right in the form y=kx.
Hint: Pay attention to the scale!
Write your answer without spaces.
Which one of these relationships is different than the other three?
Andrew and Sarah are tracking the number of steps they walk. Andrew records that he can walk 6000 steps in 50 minutes. Sarah writes the equation y=118x where y is the number of steps and x is the number of minutes she walks, to describe her step rate.
How many steps does Andrew walk per minute?
Just write the number.
Andrew and Sarah are tracking the number of steps they walk. Andrew records that he can walk 6000 steps in 50 minutes. Sarah writes the equation y=118x where y is the number of steps and x is the number of minutes she walks, to describe her step rate.
How many steps does Sarah walk per minute?
Just write the number.
Andrew and Sarah are tracking the number of steps they walk. Andrew records that he can walk 6000 steps in 50 minutes. Sarah writes the equation y=118x where y is the number of steps and x is the number of minutes she walks, to describe her step rate.
This week, Andrew and Sarah each walk for a total of 5 hours. Who walks more steps? How many more?
James wants to buy flowers for his mom for her birthday, so he checks four stores. Store A gives a table of their prices, store B gives a graph, Store C gives an equation, and Store D gives you a flyer.
Which flower shop gives the best price for flowers?