Math 8 Unit 4 Test Review Part 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.

Is this a function?

• Function
• Not a Function

Is this table a function or not a function? 

• Function
• Not a Function

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

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values
• No, because the vertical line test shows there are repeating input values

Write the equation that best matches the graph shown.

• y = 4x
• y = 4x - 3
• y = 4/3 x + 4
• y = 4/3 x - 3

Jenny writes the equation y = 1/2x +5.
Why is she incorrect?

• The slope is -2, the equation should be
  y = -2x + 5
• The y-intercept is 4, the equation should be y = -2x + 4
• The slope is -1/2, the equation should be
   y = -1/2x + 5
• The y-intercept is -5, the equation should be y = -2x - 5

Which equation matches the table below?

• y = 3x - 6
• y = -3x + 6
• y = 3x + 6  
• y = -3x - 6

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Which equation best represents the relationship between x and y in the table shown?

• y=5x + 10
• y=1/5x+5
• y= 5x+5 
• y=10x+5

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What is the rate of change in the equation?
y=8x+6

• 8
• 6

Tags

CCSS.HSF-LE.A.1B