Functions and Equations Quiz

What is the role of the independent variable in a function?

• It represents the X value.

• It is the dependent variable.

• It is the output of the function.

• It represents the Y value.

How do you convert a function rule into an equation?

• Subtract the function rule from 10.

• Multiply the function rule by 2.

• Add a plus sign at the end.

• Put 'y equals' in front of the function rule.

What is the first step in finding a two-step function rule?

• Add 5 to each input.

• Look for a pattern in the outputs.

• Multiply all outputs by 2.

• Divide the inputs by 3.

What does a linear equation graph look like?

• A triangle

• A parabola

• A circle

• A line

When graphing a function, what do the X and Y coordinates represent?

• X is the input, Y is the output.

• Both X and Y are outputs.

• Both X and Y are inputs.

• X is the output, Y is the input.

In the equation y = 3x + 2, what is the Y value when X is 1?

• 2

• 6

• 5

• 3

What is the first step in graphing a linear function?

• Draw a circle.

• Identify the function rule.

• Plot the points from the function table.

• Connect the points with a curve.

How do you determine the total cost from a graph showing the cost of magazines?

• Use the function rule derived from the graph.

• Subtract the cost of one magazine from the total.

• Add the number of magazines to the cost of one book.

• Multiply the number of magazines by 10.

What is the function rule for a graph where the cost increases by $5 for each additional magazine?

• y = 10x + 5

• y = 5x + 15

• y = 5x + 10

• y = 15x + 5

If the function rule is 5x + 15, what is the cost for 3 magazines?

• $35

• $20

• $25

• $30