8 Math Unit 3 review

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

Tags

CCSS.8.F.A.1

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Tags

CCSS.8.F.A.1

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}
• {(2,7), (3,7), (4,7), (5,8)}
• {(1,-5), (-1,6), (1,5), (6,-3)}
• {(3,-2), (5,-6), (7,7), (8,8)}

Tags

CCSS.8.F.A.1

Which graph is NOT a function?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

For the function {(0,1), (1,-3), (2,-4), (-4,1), (x,0)}, what can x NOT be in order for this to be a function?

• 0, 1, 2, 4

• 0, 1, 2, -4

• 1, -3, -4,

• 0, 1, -4, 2

Tags

CCSS.8.F.A.1

Which answer choice is true?

• The table represents a linear function because there is a pattern for the x-coordinates and y-coordinates.

• The table represents a linear function because the ratio of the change in the y value and the change in the x value is constant.

• The table represents a nonlinear function because the ratio of the change in the y value and the change in the x value is not constant.

• The table does not represent a function because there is more than one output for at least one input.

Tags

CCSS.8.F.A.3

Which table(s) represent nonlinear functions?

• Table 1, only.
• Table 2, only
• Tables 1 and 3, only
• Tables 2 and 3, only

Tags

CCSS.8.F.A.3

Which equations describe a linear function? Select all that apply.

• x - 3y=12

• y=x³

• 3y=x

• y=5x²+6x

• 4x+3y²=24

Tags

CCSS.8.F.A.3

Which equations represent nonlinear functions? Select all that apply.

• y= 3x-4

• y=9x²+7x

• y=x

• y=2x³

• 2x²=y+4

Tags

CCSS.8.F.A.3

Which show a linear function? Select 2.

• 
• 
• 
• 

Tags

CCSS.8.F.A.3