CCSS.Math.Content.8.F.B.4

Is this function linear or nonlinear?

• Linear
• Nonlinear

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CCSS.Math.Content.8.F.B.4

What is the rate of change of this table? 

• None- it's not linear
• -1
• 1
• 1/2

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CCSS.Math.Content.8.F.B.4

Which equation generates a graph containing
the set of ordered pairs shown below?
{(−15, 12), (−5, 8), (5, 4), (10, 2)}

• y = -3/5 x + 3
• y = -2/5 x + 6
• y = -1/5 x + 9
• y = -4/5 x

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CCSS.Math.Content.8.F.B.4

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2
• -1/2
• 2
• -2

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CCSS.Math.Content.8.F.B.4

Determine the slope and y-intercept.         y = 3/2x + 3

• slope: 5   y-intercept:  (0,3) 
• slope: 3/2   y-intercept:  (0,3) 
• slope:  4  y-intercept:  (0,3/2)
• slope: 1/5   y-intercept:  (0,5) 

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CCSS.Math.Content.8.F.B.4

For the equation
y - 3 = 2(x + 4),
which of the following is true?

• The line has m = 2 passing through the point (4, -3)
• The line has m = 2 passing through the point (3, -4)
• The line has m = 2 passing through the point (-4, 3)
• The line has m = 2 passing through the point (-3, 4)

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CCSS.Math.Content.8.F.B.4

What is the y-intercept in this table?

• (-2, -2)
• (1, 2)
• (0, 6)
• (6, 0)

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CCSS.Math.Content.8.F.B.4

Data was collected on the weight of a male  laboratory rat for the first 25 weeks after its birth. The linear regression equation is 
y= 40x+100, where x is number of weeks and y is weight in grams. 
What does the y-intercept mean in context of the problem?

• The predicted weight of the rat in year 0. 
• The predicted weight of the rat at birth. 
• The current weight of the rat. 
• The average increase in the rat's weight. 

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CCSS.Math.Content.8.F.B.4

What is the range of the graph?

• -7 ≤ x < 5
• -3 ≤ x < 1
• -3 ≤ y < 1
• -7 ≤ y < 5

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CCSS.Math.Content.8.F.B.4

One type of redwood tree has an average height of 65 feet when it is 20 years old. If the tree is more than 20 years old, the average height, h, can be modeled by the function h = 1.95(a − 20) + 65, where a is the age of the tree in years. Which statement about this situation is true?

• Every additional 1.95 ft of length over 20 ft adds 45 years to the age of this type of redwood tree.
•  For this type of redwood tree, the average height increases by 1.95 ft per year throughout its lifetime.
• Each additional year of age over 20 years adds 1.95 ft to the average height of this type of redwood tree.
•  For this type of redwood tree, the average height increases by 65 ft for every 20 years of growth.

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CCSS.Math.Content.8.F.B.4