A.9 line and curve of best fit for Scatter plots

Find the line of best fit using a graphing calculator through these points: (0,0), (1,2), (3,5), (6,7).

• y=65x+7

• y=1.14x+.64

• y=1.5x+64

Tags

CCSS.8.EE.B.5

The table shown compares a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57

• f(x) = 5.57x + 25.05

• f(x) = -5.57x + 25.05

• f(x) = 5.57x - 25.05

Find the best fitting quadratic model for the data given.

• y = 1.2x^2 + 13x + 504.3

• y = 12x^2 + 13x + 504.3

• y = .12x^2 + 1.3x + 504.3

Using the quadratic curve of best fit, find the height of the ball when it traveled a distance of 10 feet.

• 12.8 ft

• 13.3 ft

• 11.1 ft

• 17 ft

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 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? Round your answer to the nearest whole number.

• 22 feet

• 23 feet

• 36 feet

• 37 feet

If the line of best fit is given, y = 31.45x - 242.3, where x represents hours and y represents income, determine the predicted income if 22 hours were worked on an assembly job.

• $207.30

• $449.60

• $691.90

• $543.30

Tags

CCSS.HSF.LE.B.5

Which would best fit the following data:

{(-15, 53.5), (-14, 28), (-3, 18), (0, 4), (6, 27), (14, 50)}

Hint: Put the table or points into DESMOS and look at what shape they take.

• Line of best fit

• Curve of best fit

Tags

CCSS.HSF-LE.A.1B

Determine which function best fits the given data? (Hint: Put the table or points into DESMOS and look at what shape they take)

• line of best fit

• curve of best fit

• Neither

Which equation best fits this graph of points?

• y = 0.59x + 0.29

• y = 2x²

• y = 0.48x + 0.74

• y = -0.1x² + 0.38x + 1.44