Dependent/Independent Variables, Tables, Equations, and Graphs

Rolando’s backpack weighs 2.5 pounds when it is empty. The total weight in pounds, y, of Rolando’s backpack when it contains x pounds of books is represented by the equation y = x + 2.5. Which table best represents this situation?

• A

• B

• C

• D

Which equation represents the relationship in the table?

• b = d - 3.75

• d = 2b

• d = b +1.25

• b = d + 3.75

The graph shows the number of points y, a player earns in a video game based on the number of diamonds the player collects, x.

Which equation best represents the relationship between x and y?

• x = y + 75

• y = x + 75

• y = 75x

• x = 75y

Which statement describes the relationship between x and y in these two equations?

• In y = 5x and y = x + 5, the value of y is 5 times the value of x.

• In y = 5x and y = x + 5, the value of y is 5

  more than the value of x.

• In y = 5x the value of y is 5 more than the

  value of x, and in y = x + 5 the value of y is

  5 times the value of x.

• In y = 5x the value of y is 5 times the value

  of x, and in y = x + 5 the value of y is 5 more than the value of x.

What is the dependent variable in the equation y = 3x - 2?

• y

• x

• -2

• 3x

In the equation y = 2x - 4, what is the dependent variable?

• 2x

• x

• -4

• y

• the independent variable is time

• the independent variable is d=25 t

• the dependent variable is time

• the independent variable is distance

Which statement is true about the set of numbers and its relationship to the graph?

• {1,2,3,4} represent the set of dependent quantities shown in the graph.

• {2,4,6,8} represent the set of independent quantities shown in the graph.

• {1,2,3,4,6,8} represent the set of independent quantities shown in the graph.

• {2,4,6,8} represent the set of dependent quantities shown in the graph.

In the table, Bubbles is the ______________.

• independent variable

• dependent variable

What is the dependent variable on the graph?

• Number of Hours (h)

• Cost (c)