Introduction to Functions Answers

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1
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Is the situation a function?

A
Yes, because each input has exactly one output.
B
Yes, because each input has more than one output.
C
No, because each input has exactly one output.
D
No, because each input has more than one output.
2
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Why would removing this ordered pair make the relation a function?

A
Every input must be paired with exactly one output.
B
Every output must be paired with exactly one input.
C
The input and output values cannot be the same.
D
The input value cannot be smaller than the output value.
3

Identify which of the following equations represent functions. Select all that apply.

A
y = 4x + 13
B
x = 5
C
x2 + y2 = 16
D
y2 = x - 6
Option D
E
y = 3x2 - x - 1
4

Question text not available

Answers:
does not represent a function.:3
.:The same number of credit cards can have different totals.
6

Determine which of the following are functions. Select all that apply.

A
Option
Option A
B
{(-4, 2), (-2, 1), (-1, 3)(-1, 4), (0, 5), (2, 5)}
C
Option
Option C
D
y = -4x² + 45x + 9
9

Is the airplane’s altitude a function of time?

A
Yes, because any input of time results in only one output of altitude.
B
Yes, because the airplane increases and decreases in altitude at the same rate.
C
No, because each output of altitude has more than one input of time.
D
No, because the altitude is constant between 60 minutes and 130 minutes.
13

Select question 8d5cc66c

A
A cell phone bill is unrelated to the amount of minutes used.
B
A given side length of a square could have a range of perimeters.
C
The same number of credit cards can have different totals.
14

Which did you include in your response?

A
Draw vertical lines to intersect on a graph.
B
The relation is a function if there’s only one point of intersection on a graph.
C
The relation is not a function if there’s more than one point of intersection on a graph.
D
The vertical line test is used to determine if each input has exactly one output.
15

Select any items on the list that you included in your response:

A
The activity type would be the input and the cost would be the output.
B
Because the rec center charges different prices for the same activity on different days, one input does not result in exactly one output.
C
No, the situation does not represent a function.

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