Scatter Plot, Best Fit Line

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

In the equation of the line of best fit, the m stands for?

• the slope

• the y-intercept

• the x-intercept

• the strength of the data points

Q1. What is the trend observed in the data?

• A) positive trend

• B) negative trend

• C) no trend

• positive trend
• negative trend
• no trend

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

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

In a scatterplot, an outlier...

• ...is something we didn't learn 8th grade

• ...is a puppet with a long nose named Pinocchio

• ...is a point that is far outside the main cluster of points/ordered pairs

• ...is a really naughty point who doesn't tell the truth when outside

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

Which graph best shows a positive correlation between the number of hours studied and the test scores?

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How can a line of fit be used in a scatter plot?

• To predict future outcomes

• To calculate the sum of all data points

• To divide the plot into equal parts

• To color code the data points