SOL A.8 & A.9 Review

Look at the data in this table.
Which equation most closely represents the line of best fit for this data?

• y = 1.77x + 0.13
• y = 0.56x - 0.05
• y = 0.5x
• y = 2x

Tags

CCSS.8.EE.B.5

The number of complaints a company received at the end of each of six weeks is shown in this table.  
Based on the line of best fit, how many complaints should the company expect at the end of week 8?

• 75
• 91
• 96
• 110

Calculate the Curve of Best Fit for this table of values:

• y = 2x² - 9x + 10

• y = 3x² + 9x - 10

• y = 3.1x² - 9.2x - 10.3

• y = 2.1x² - 8.6x + 10.1

The table shows the average braking distance of a car at various speeds.  Use a quadratic model to predict the breaking distance at 70mph.  

• 245 ft
• 225 ft
• 285 ft
• 265 ft

Match the table with the correct equation:

x | y

-5 | 12

-4 | 11

0 | 9

2 | 15

3 | 25

• y = -.08x² + 5.94x +28.80

• y = -1.2x² + 3.2x +3.2

• y = 0.5x +9

• y = 0.7 x² + 2.7x +8.7

 Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

• y=1344x
• y=100x
• y=5.25x
• y=4/21x

The number of kilograms of water in a person’s body varies directly as the person’s mass.  A person with a mass of 90 kg contains 60 kg of water.  How many kilograms of water are in a person whose mass is 75 kg?

• 50 kg water
• 72 kg water
• 94 kg water
• 150 kg water

Is the given table a direct variation? If so, what is the constant of variation?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

What is the constant (k) in this inverse variation?

• 12
• 24
• 48
• Not enough information given