Spring Semester Review

[Diagram: input-output mapping with input values 1 and 4, and output values -1, 1, 2, -2. Arrows show 1 maps to -1, 1, 2 and 4 maps to -2.]

• Function

• Not a Function

Is this mapping a function or not a function?

• Not a Function

• Function

The approximate volume in milliliters, m, for a volume of f fluid ounces is equal to 29.57 times the value of f. Which equation represents this relationship?

• F

• H

• G

• J

A student is conducting an experiment measuring plant growth. The initial height of the plant is 1.5 inches and the plant grows at a rate of 2 inches per week. Based on this information, which representation best shows the relationship between the height of the plant, y, and the amount of weeks that have passed, x?

• (Graph)

• y = 2x + 1.5

• (Graph)

• not here

Rudolfo has 15 toys in his toy box, and he adds 2 new toys every month. Based on this situation and the tables and graphs below, which table and graph best represent the relationship between the number of toys Rudolfo has in his toy box, y, and the number of months that have passed, x?

• G

• J

• H

• F

Is the equation y=7x+5 proportional or non-proportional?

• non-proportional

• proportional

Which equation is proportional?

• y=7x

• y=2x+7

• y=4x-3

• y=5x+1

The graph shows the relationship between the cost of some pecans and the weight of the pecans in pounds. Which function best represents the relationship shown in the graph?

• y = 5x

• y = 2x

Which function is best represented by this graph?

• y = 4x - 2

• y = 4x + 8

The ticket sales for a concert started at 4:00 PM. The table shows the linear relationship between the number of tickets remaining and the number of hours since 4:00 PM. Which function can be used to find y, the number of tickets remaining x hours since 4:00 P.M.?

• y = -3,000x + 12,000

• y = -3,000x + 15,000

• y = -3,000x - 12,000

• y = -3,000x + 15,000