Unit 2A Flashcard (Line of Best Fit & Correlation)

Front

What is the line of best fit? Options: f(x)= 5x+1.82, cannot be determined, f(x)= 1.82x + 5.02, f(x)= 1.1x + 4.2

Back

f(x)= 1.82x + 5.02

Front

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?

Back

37 feet

Front

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

Back

y=1.14x+.64

Front

Estimate the correlation coefficient for this scatterplot.

Back

r = -0.9

Front

What type of correlation does this graph show?

Back

none

Front

r=-0.89

Back

Strong negative 

Front

What does a correlation coefficient of
r = 0.99999 mean?

Back

strong positive correlation

Front

A perfect positive correlation has a correlation coefficient of ____.

Back

1

Front

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong. Options: -0.19 weak, -0.19 moderate, 0.04 weak, 0.04 strong

Back

-0.19 weak

Front

Relationship between miles driven and gas remaining: Options: There is no relationship between the number of miles driven and the amount of gas remaining in the tank, As the number of miles driven increases, the amount of gas remaining in the tank increases., As the number of miles driven increases, the amount of gas remaining in the tank decreases., A relationship cannot be determined from this scatter plot

Back

As the number of miles driven increases, the amount of gas remaining in the tank decreases.