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Eighth Grade (Grade 8) Functions and Relations Questions

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Grade 8 Functions and Relations
Which of the following equations is an example of direct variation?
  1. 3y = 6x + 1
  2. 2y = 12x
  3. 2y + x = 7
  4. All of the above represent direct variation
Grade 8 Functions and Relations CCSS: 8.F.A.2
Which equation below has a larger rate of change than this graph? Graph - Linear Function y=-2x
  1. [math]y=-1/3x[/math]
  2. [math]y=1/2x[/math]
  3. [math]y=-1/5x-3[/math]
  4. [math]y=9/2x[/math]
Grade 8 Functions and Relations
Grade 8 Functions and Relations
Grade 8 Functions and Relations
A domain is
  1. a mathematical sentence starting that two quantities are equal.
  2. an expression that has a root.
  3. the set of x-coordinates in a relation.
Grade 8 Functions and Relations
For a function, written in standard form, to be linear it must meet certain criteria. Pick THREE such criteria, listed below, that are valid.
  1. x and y CAN be multiplied
  2. x and y CAN be in the denominator
  3. x and y HAVE exponents of 1
  4. x and y have an exponent other than one
  5. x and y are NOT multiplied together
  6. x and y do NOT appear as the denominator
Grade 8 Functions and Relations CCSS: 8.F.A.2, 8.F.B.4
Grade 8 Functions and Relations
Which relationship is a direct variation?
  1. x=1,2,3,4 and y=-1,0,1,2
  2. x=1,2,3,4 and y=0,-1,-2,-3
  3. x=1,2,3,4 and y=3,5,7,9
  4. x=1,2,3,4 and y=3,6,9,12
Grade 8 Functions and Relations CCSS: 8.F.A.1
Which of the following relations is also a function?
  1. {(2,4), (3,5), (2,7)}
  2. {(3,5), (4,6), (3,7)}
  3. {(-2,1), (-2,3), (6,5)}
  4. {(10,0), (2,4), (-2,6)}
Grade 8 Functions and Relations CCSS: 8.F.A.2, 8.F.B.4
Grade 8 Functions and Relations CCSS: 8.F.A.2, 8.F.B.4
Grade 8 Functions and Relations CCSS: 8.F.A.1
Which sets of ordered pairs represent functions?
  1. {(4,6) (5,7) (6,8) (7,9)}
  2. {(1,8) (2,8) (3,8) (4,8) (5,8)}
  3. {(2,4) (2,7) (6,4) (12,10) (15,5)}
  4. {(3,5) (3,9) (3,11) (3,15)}
Grade 8 Functions and Relations CCSS: 8.F.A.2, 8.F.B.4
Grade 8 Functions and Relations
Grade 8 Functions and Relations CCSS: 8.EE.C.7a
Solve the following equation:
2(-3x+5)-12=9x-3(5x+4)
  1. Infinitely Many solutions
  2. x=1
  3. x=0
  4. No Solution
Grade 8 Functions and Relations CCSS: 8.F.A.3
Is this graph linear?
Graph - Linear Function y=-2x
  1. Yes
  2. No
  3. Not enough information
  4. Sometimes
Grade 8 Functions and Relations CCSS: 8.F.A.2
Grade 8 Functions and Relations CCSS: 8.F.A.3
Is this graph linear?
Graph - Quadratic Function y=-1/2x^2
  1. Yes
  2. No
  3. Not enough information
  4. Sometimes
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