Line of Best Fit

Which graph has a correlation coefficient (r) of about -.6 ?

• a

• b

• c

• d

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

Which line is the best line of best fit?

• a

• b

• c

• i don't see any lines

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

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?

• 22 feet

• 23 feet

• 36 feet

• 37 feet

Q1. What is the trend observed in the data?

• A) positive trend

• B) negative trend

• C) no trend

• positive trend
• negative trend
• no trend

The table shown is comparing 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 line of best fit using calculator through these points (0,0)(1,2) (3,5) (6,7)

• y=65x+7

• y=1.14x+.64

• y=1.5x+64

What is the line of best fit?

• f(x)= 5x+1.82

• cannot be determined

• f(x)= 1.82x + 5.02

• f(x)= 1.1x + 4.2