2. The table shows the mortgage interest rates y at a local bank for the years 2010 through 2017.
Year since 2010, X
Rate (%), y
0 1 2 3 4 5 6 7
4.7 4.4 3.6
3.6 3.9 4.1 3.8 3.6 3.9
a. Make a scatter plot of the data.
b. Draw a line of best fit.
c. Write the slope
of the line of best fit.
d. Interpret the slope of the line of best fit.
e. Assuming this trend continues, what would be the mortgage interest rate
for the year 2020? Explain your reasoning.