Chapter 7 Review Functions

Is this relation a function?

• yes

• no

Is the relation a function?

• yes

• no

Is this relation a function?

• yes

• no

The __________ represents the input and the y-coordinate represents the output.

• y-coordinate

• slope

• x-coordinate

• solution

The x-coordinate represents the input and the ____________ represents the output.

• y-coordinate

• slope

• x-coordinate

• solution

Choose the mapping diagram that represents the relation shown in the graph.

• 
• 
• 
• 

The mapping diagram represents the lengths (in cm) of a rubber band when different amounts of force (in Newtons) are applied.

Is the length of a rubber band a function of the force applied to the rubber band?

• yes

• no

The mapping diagram represents a function of the lengths (in cm) of a rubber band when different amounts of force (in Newtons) are applied.

Describe the relationship.

• The length of the rubber band increases by 2 cm for each 0.7 Newton increase in the force applied to the rubber band.

• Rubber bands are stretchy.

Which is the function rule for "The output is two less than the input."

• x=2-y

• y=x-2

• y=2-x

• x=y-2

Which is the function rule for "The output is two more than one-forth of the input."

• $2+x=\frac{1}{4}$

• $x=\frac{1}{4}y+2$

• $y=2-\frac{1}{4}x$

• $y=\frac{1}{4}x+2$