Cupcake Sales Equation Worksheet

Maria is selling cupcakes for $1.65 each. Let c be the number of cupcakes Maria sells. Let s be her sales in dollars. Which equation represents the relationship between c and s?

• s = 1.65c

• c = 1.65s

• s = c + 1.65

• c = s + 1.65

For several weeks, Teddy really focused his time on studying and saw his math quiz scores slowly improve. As he began to understand the concepts, his scores improved more rapidly. He then stopped studying and his quiz scores no longer improved. Which of the following graphs represents Teddy's quiz scores as a function of time in weeks?

• [Graph a]

• [Graph b]

• [Graph c]

• [Graph d]

Which of the following is NOT a true statement about the graph of the linear equation 3x + 5y = 20?

• The y-intercept of the line is (0,4).

• The slope of the line is -3/5.

• As the values of x increase, the values of y increase.

• The line intersects the x-axis at a positive value.

Jelani made a mistake solving an equation. His work is shown below. 5x - 3(2x - 4) = 2x step 1 -3(2x - 4) = -3x step 2 -6x - 12 = -3x step 3 -12 = 3x step 4 -4 = x step 5 Where did Jelani make a mathematical mistake?

• Going from step 1 to step 2.

• Going from step 2 to step 3.

• Going from step 3 to step 4.

• Going from step 4 to step 5.

Which of the following statements represents the rate of change of the line containing the data in the table?

• The cost of parking per hour

• The cost of parking for 6 hours

• The total cost of parking for any number of hours

• The difference between the cost of parking for 1 and 6 hours

The zeros of the function f(x) = -7(x + 2)(5x - 15) are:

• -2 and -3

• -2 and 3

• 2 and -3

• 2 and -3

• 2

• 7

• 10

• 13

If Sam works h hours per week, then his weekly income from his car repair business is 15h - 100. Which of the following best describes the meaning of 15 in this expression?

• The number of hours he works per week

• The amount of money he makes after he accounts for the cost to run his business

• The amount he earns each hour

• The amount of money he makes before he accounts for the cost to run his business

The temperature T (in Fahrenheit) as a function of altitude a (in feet) is modeled by the linear function T = - (35/10000)a + 60. Which of the following statements is a correct interpretation of the slope of the linear model?

• For each increase of 10000 feet in elevation, the temperature increases by 35/10000 degrees Fahrenheit.

• For each increase of 10000 feet in elevation, the temperature decreases by 35/10000 degrees Fahrenheit.

• For each increase of 1 foot in elevation, the temperature increases by 35/10000 degrees Fahrenheit.

• For each increase of 1 foot in elevation, the temperature decreases by 35/10000 degrees Fahrenheit.