Answer
The scatter plot of the data is below.
$\hat y (with\ outlier) = 31.12 - 0.4132 x$
$\hat y (without\ outlier) = 21.46 - 0.8403 x$
The outlier influences the regression line as it does not follow the trend of other data; hence, the direction of the line is changed to minimize the sum of squares.
Work Step by Step
Insert scatterplot in Excel from the charts option, and then format it.