Relations and Functions Review

Multiple Choice

Identify the domain of the function:

{(3, 4), (5, 8), (7, 4), (1, 5)}

• {4, 8, 5}

• {3, 5, 7, 1}

Multiple Choice

Is this a function?

{(3, 5), (4, 6), (5, 7), (6, 8)}

• yes

• no

Multiple Choice

Given $$f\left(x\right)=5x+2,$$  find f(4).

• 20

• 18

• 22

• 11

Multiple Choice

What is the range of the function?

• $$-1\le y\le5$$  

• $$-1\le y\le-4$$  

• $$1\le y\le4$$  

• $$-4\le y\le5$$  

Fill in the Blanks

Multiple Choice

What linear function models the table of values?

• $$f\left(x\right)=\frac{1}{3}x-1$$  

• $$f\left(x\right)=3x-1$$  

• $$f\left(x\right)=-3x-1$$  

• $$f\left(x\right)=\ -\frac{1}{3}x-1$$  

Multiple Choice

Is the relation a function?

If it is, match it to its domain and range.

• no it is not a function

• Yes it is a function. Domain: {-3, -2, -1, 0, 1, 2, 3}

  Range: {7, 2, -1, -2}

• Yes it is a function

  Domain: {7, 2, -1, -2}

  Range: {-3, -2, -1, 0, 1, 2, 3}

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Consider the graph shown. What is the domain?

• $$200\le x\le800$$  

• $$0\le x\le10$$  

• $$0\le x\le300$$  

• $$200\le x\le300$$