Unit 3: Functions

State the Range of this relation: {(6,91),(1,-23),(-2,4),(-2,3),(3,4)}

• {6,1,-2,3}

• [91,-23,4,3]

• {-23,3,4,91}

• N/A

• {3,1,9,4,20}

If f(x) = 3x + 4x + 5x + 2, find f(3)

• 21

• 39

• 38

• 21

• 12x + 2

On a graph, how do you tell if the relation is a function?

• Horizontal Line Test

• You cannot

• Vertical Line Test

• Plug in values until you get an error

.

• Function
• Not a Function

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; there is a line connecting the dots.

The function h(t) represents the height in inches of a plant after t weeks. What does the notation h(4) = 5 mean?

• After 5 week the plant is 4 inches tall
• The plant grows at a rate of 5/4 inch per week
• After 4 weeks the plant is 5 inches tall
• The plant grows at a rate of 1 inch per week

What is the domain of the graph?

• 1≤ x ≤ 4
• 1 < x < 4
• 1≤ y ≤ 4
• 1 < y < 4

What is the range of the graph?

• 1 ≤ x ≤ 5
• 1 < x < 5
• 1 ≤ y ≤ 5
• 1 < y < 5

Determine which of the following is NOT a function.

• A
• B
• C
• D

Determine which of the following is a function.

• A
• B
• C
• D