8 Checkpoint 2-8.AF.3 I Learn Review

The list displays several sets of ordered pairs. {(3, -5), (-2, 4), (7, 1)} Select ALL the numbers that are independent variables from the given set of ordered pairs.

• -2

• -5

• 1

• 7

• 3

The graph displays several sets of ordered pairs. Select ALL the numbers that are dependent variables from the given set of ordered pairs.

• -1

• -3

• 2

• 0

• -4

Select ALL descriptions that accurately define the meaning of a function.

• Every x-coordinate has one unique y-coordinate.

• Every y-coordinate has one unique x-coordinate.

• Every dependent variable has one unique independent variable.

• Every independent variable has one unique dependent variable.

• Set of ordered pairs.

A set of ordered pairs is given. (2,5), (3, 7), (2, 9), (4, 5) Determine if this set represents a function. Explain your reasoning.

• Yes, it is a function because each input has a unique output.

• No, it is not a function because the input 2 has multiple outputs.

Which graph represents a function?

• a

• b

• c

• d

Which table of values represents a function?

• a

• b

• c

• d

Select the boxes to identify whether each set of ordered pairs is a function or is not a function.

• is a function

• {(1,3), (1,5), (4,9), (6,13)}

• is not a function

• {(1,3), (2,5), (4,9), (4,13)}

• is a function

• {(1,3), (2,5), (4,9), (6,13)}

• is not a function

• {(1,3), (2,5), (3,9), (6,13)}

A girl makes a chart of her height, in inches, each year on her birthday. She started her chart on her fourth birthday and added her height each year through her ninth birthday. Table 1 shows the data she recorded. Table 1: Height Each Year | Age | Height (inches) | |-----|----------------| | 4 | 41 | | 5 | 44 | | 6 | 47 | | 7 | 49 | | 8 | 51 | | 9 | 54 | Is this relation a function? Explain your answer.

• Yes, because each age corresponds to exactly one height.

• No, because some ages correspond to multiple heights.

• Yes, because the heights are increasing.

• No, because the heights are not unique.

Evaluate the table and determine if the boater’s statement is correct or incorrect.

• Correct

• Incorrect

Based on the table, determine if the relation between the students and the number of books they read is a function. Explain your reasoning.

• Yes, because each student is associated with a unique number of books read.

• No, because at least one student is associated with more than one number of books read.

• Yes, because the number of books read is the same for all students.

• No, because the number of books read is not the same for all students.