Lesson 4-2 (Pg. 240-241)

What is the definition of an independent variable?

• A variable that changes in response to another variable.

• A variable that does not change in response to others.

• The output of a function.

• The value of a dependent variable.

What is the perimeter of a figure formed by 3 rectangles, where each rectangle has a width of 1 and a height of 6?

• 14

• 16

• 18

• 20

In the problem involving the perimeter of combined rectangles, which variable represents the independent variable?

• The perimeter of the figure (y)

• The number of rectangles (x)

• The length of the rectangle (6)

• The width of the rectangle (1)

What equation represents the relationship between the number of rectangles (x) and the perimeter (y) of the combined figure?

• y = 6x + 2

• y = 2x + 6

• y = 2x + 12

• y = 12x + 2

A sequence of figures is formed by connecting triangles. The perimeter of 1 triangle is 10, 2 triangles is 14, and 3 triangles is 18. What is the perimeter of a figure formed by 5 triangles?

• 22

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• 28

What defines a linear function?

• A relationship that pairs each input value with exactly one output value.

• A function whose graph is a nonvertical line or part of a nonvertical line.

• A function that always passes through the origin.

• A relationship where one input can have multiple outputs.

A camera's memory starts at 512 MB. Each photo taken reduces the memory by 3 MB. If 'x' represents the number of photos taken and 'y' represents the remaining memory, which equation models this relationship?

• y = 3x + 512

• y = 512 - 3x

• y = 512x - 3

• y = 3 - 512x

A pattern of squares is arranged to form figures. The perimeter of 1 square is 4, and the perimeter of 2 squares is 6. What is the perimeter of a figure formed by 3 squares?

• 7

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• 10