2.1-2.3 Review

(1,5), (1,6), (1,7), (1,8), (1,9)

Is this relation a function?

• Function

• Not a function

Is this relation a function?

• Function

• Not a function

Does this represent a function?

• Yes

• No

Is relation shown a function?

• YES
• NO

Is this a function? Explain.

• Yes; it passes the horizontal line test.
• No; it is not a straight line.
• Yes; it passes the vertical line test.
• No; it does not pass the vertical line test

What is the RANGE of this graph?

• (-7 , 5)

• [-7 , 5)

• (-3 , 1)

• [-3 , 1)

What is the DOMAIN of this graph?

• (-inf, -3)

• (-inf, -3]

• (-3, inf)

• [-3, inf)

What is the domain of the graph?

• {-4, 0, 2, 4}
• {-5, -4, -3, -1}
• {-5, -4, -3, -1, 0, 2, 4}
• All real numbers

If f(x) = 2x + 1, what would be your first step to find f(1)?

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

Given f(x) =
2x² + 5x - 17, find f(-1). 

• f(-1) = -20
• f(-1) = -24