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Laabri

7th Math 1.2 Classwork (8/23/22) B

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Math - [Lesson 1.1]

Teacher: Mr. Kovalik (408) 314-1092

Objective and Summary:

SWBAT identify the constant of proportionality between two quantities

1. Sweat it Out—A PE teacher gathered data during her class today and found how many calories students burn by jumping rope:

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1.

a) Is the number of calories burned proportional to time? How do you know?

"This (is / is not proportional) because..."

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2.

b) If Makayla jumped rope for 7 minutes, how many calories would you expect her to burn?

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3.

c) If Makayla instead jumped rope for 10 minutes, how many calories would you expect her to burn?

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4.

If y is the amount of calories burned and x is the minutes spent jumping rope, write an equation to represent the relationship between the two quantities:

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5.

Steak--One thing everyone should know about Mr. Hwung is that one of his favorite dishes to make is a nice rib-eye steak cooked medium-rare. When he went to the store, the butcher gave him the following table:

a) Is the cost of steak proportional to the weight? How do you know?

"The cost of steak (is / is not) proportional to the weight because..."

CFS:

#1: Accurately computes unit rate or constant of proportionality

#2: Accurately explains using appropriate vocabulary

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6.

b) If the total cost of steak is y and the pounds of steak is x, write an equation to represent the relationship between the two quantities.

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7.

c) How can you prove that your equation in #6 is correct? Explain with math evidence.

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8.

a) Ms. Phanchan is baking cookies and uses a constant amount of flour for each batch.

What is the value that goes in the blank to complete the table?

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9.

b) Write an equation to represent the proportional relationship.

(Example: y=10x)

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10.

If you finish early...

What's your favorite dessert? (Like brownies, NOT desert like the Sahara) 😄

You can draw it too!