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Ninth Grade (Grade 9) Functions and Relations Questions

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Grade 9 Functions and Relations CCSS: HSF-LE.B.5
Kyle is an avid bird watcher, and is trying to spot some of the more rare birds in his area. He has already seen 8. However, it has taken 8 months to spot these birds. Kyle's friend is also a bird watcher, and says he typically sees 4 rare birds a month in a large forest outside the town. If Kyle decides to try looking for birds at the forest outside of town, is the linear function B(m)=2+4m correct in predicting the total number of rare birds, B, he will have seen in m months time? If not, why not?
  1. Yes, this function is correct.
  2. No. Kyle has already seen 8 birds, so the constant term should be 8, not 2.
  3. No, since the rate at which Kyle sees birds is incorrect. He has seen 8 birds over 8 months. This means the coefficient of m should be 1, not 4.
  4. No, the equation should be B(m)=4+2m, since 4 represents the number of birds already seen (divided by 2 to account for the 2 sites, the park and the forest), and 2 rare birds per month is the rate at which he will probably see more rare birds.
Grade 9 Functions and Relations CCSS: HSF-LE.B.5
Shawn put some money into an account that earns simple interest according to the function A(t)=1000⋅(1+0.015t), where A is the amount of money in the account after t years. What does the value 1,000 represent?
  1. The total value of money in the account after t years.
  2. The interest earned after t years.
  3. The initial investment.
  4. The interest rate, as a percent.
Grade 9 Functions and Relations
The x-value is also known as, or related to, which of the following?
  1. Independent Variable
  2. Input
  3. Dependent Variable
  4. Range
  5. Domain
  6. Ouput
  7. A, B, and E
  8. C, D, and F
Grade 9 Functions and Relations
Relations can be shown as
  1. a mapping diagram.
  2. a table.
  3. a graph.
  4. all of the above
Grade 9 Functions and Relations CCSS: HSF-IF.A.1
Find the domain and range.

{(8,3), (2,7), (0,3), (5,9), (1,2)}
  1. D: {0, 1, 2, 5, 8}, R: {2, 3, 3, 7, 9}
  2. D: {0, 1, 2, 5, 8}, R: {2, 3, 7, 9}
  3. D: {2, 3, 7, 9}, R: {0, 1, 2, 5, 8}
  4. D: {2, 3, 3, 7, 9}, R: {0, 1, 2, 5, 8}
Grade 9 Functions and Relations CCSS: HSF-LE.A.1, HSF-LE.A.1a
Which describes a function that has a constant factor per interval?
  1. Linear
  2. Exponential
  3. Both a and b
  4. None of the above
Grade 9 Functions and Relations CCSS: HSF-IF.A.1
Range refers to the x-coordinate values.
  1. True
  2. False
Grade 9 Functions and Relations CCSS: HSF-BF.A.1, HSF-BF.A.1a
Jorel has a sister that is 5 years younger than three times his age. Write a function that represents this situation.
  1. f(x)=5-3x
  2. f(x)=5-3
  3. f(x)=5x-3
  4. f(x)=3x-5
Grade 9 Functions and Relations
A graph made up of connected lines or curves.
  1. Discrete Graph
  2. Continuous Graph
  3. Line Graph
Grade 9 Functions and Relations
An x-value that makes the function equal to 0 and also describes the x-intercepts of the quadratic equation.
  1. Vertex
  2. Zero of a Function
  3. Minimum
  4. Coordinate
Grade 9 Functions and Relations CCSS: HSF-IF.A.2
Given h(x)=x2-8x, find h(4).
  1. 8
  2. 48
  3. -16
  4. 50
Grade 9 Functions and Relations CCSS: HSF-BF.A.1, HSF-BF.A.1a
The tree in Damien's backyard is 52 feet tall. It grows 0.6 feet per year. Write a function that represents this situation.
  1. f(t)=52t+0.6
  2. f(t)=52+0.6t
  3. f(t)=52+9t
  4. f(t)=52t+9
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