SWBAT decide whether two quantities are proportional to each other by checking for a constant multiple for all x’s and y’s in a table
1 point
1
Question 1
1.
More Shops—Ms. Bizzell is opening a store that exclusively sells Pokemon cards.
a) Does Ms. Bizzell's pricing show a proportional relationship? Explain.
"I think Ms. Bizzell’s pricing (shows / does not show) a proportional relationship because…"
CFS:
#1: Accurately computes unit rates or finds constant of proportionality
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
1 point
1
Question 2
2.
Weather—It doesn’t snow often in San Jose, but some data on the amount of snowfall during the last snowstorm in 1976 was recorded in the table below:
a) Is the relationship between time (x) and snowfall (y) proportional? How do you know?
"I think the relationship between time and snowfall (is / is not) proportional because..."
CFS:
#1: Accurately computes unit rates or finds constant of proportionality
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
MEDIUM Problems
1 point
1
Question 3
3.
Savings--This summer, Destiny started a summer job and put money into her savings account. She deposited $12.50 each week.
Is there a proportional relationship between dollars and days? Explain.
CFS:
#1: Accurately computes unit rates
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
1 point
1
Question 4
4.
Blockbuster--Back when your teachers were kids, we had to rent movies from a place called Blockbuster. The table below shows how much money Mr. A paid and how long he could keep the movies for.
Is there a proportional relationship between the cost of renting and the total number of days? Explain how you know.
CFS
#1: Accurately computes unit rates
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
SPICY Problems (Try if you have time)
1 point
1
Question 5
5.
Music—When Mr. Hwung was in college, he had a student discount for his monthly Spotify membership. The amount he paid is show in the table below:
a) Is the relationship between the months of Spotify membership and the total costs proportional? How do you know?
CFS
#1: Accurately computes unit rates
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
1 point
1
Question 6
6.
Wake Up!—Mariah noticed that some of her classmates were falling asleep in class, so she decided to go to Wafesay to buy some coffee. It turns out that they sell coffee in a few different-sized bags:
a) Is the price of coffee proportional to the amount of coffee? Why or why not?
CFS
#1: Accurately computes unit rates
#2: Accurately explains if a table is proportional using appropriate vocabulary and evidence
4 points
4
Question 7
7.
Commission--Mr. Hwung knows someone named Selly McCarman, who is a car salesman. He makes money from commission, which means he earns more money when he sells more cars.
A table of Selly's sales from last month is below:
Is the amount of money that Selly earned proportional to the number of cars he sold? Explain and check that you meet all CFS.
CFS
#1: Accurately computes unit rates
#2: Accurately explains claim using appropriate vocabulary/evidence