Algebra 1 Line of Best Fit

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

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

Which equation best represents this data set?

• y = 1.1x - 4.2

• y = 1.1x + 4.2

{(-5, 9), (2, 31), (9, 143), (11, 151), (0, 42), (5, 97)}

Using the equation of the line of best fit, which number is the best prediction of the output when the input is 13?

• 127

• 159

• 170

• 178

What is the line of best fit? (Click on the graph to enlarge it.)

• y = 5/3x + 375

• y = 1/3x + 475

• y = 5/3x + 3

• y = 1/3x + 375

Using the curve of best fit, what would be the output (y) when the input (x) is 7? (Click the graph to enlarge it.)

• 260

• 240

• 140

• 320

What would the equation be that best fits this data?:
{(-15, 53.5), (-14, 28), (-3, 18), (0, 4), (6, 27), (14, 50)}

• y = .17x²+.45x+12.43

• y = .16x²+.45x+12.42

• y = -.04x + 30

• y = -.03x + 30

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

What is the line of best fit? (Click on the chart to enlarge it.)

• f(x)= 5x+1.82

• cannot be determined

• f(x)= 1.82x + 5.02

• f(x)= 1.1x + 4.2

The table shows the height of a tree for various years after it was planted. Using the line of best fit, how tall would the tree be 30 years after it was planted? (Click on the chart to enlarge it.)

• 22 feet

• 23 feet

• 36 feet

• 37 feet