Computing a Least-Squares Regression Line Cars Sold
Day Number Sold
The table shows the number of cars sold per day at a
dealership during a promotional sale.
What is the equation of the least-squares regression
line, where y is the predicted number of cars sold and x
is the day? Round each coefficient or constant to the
nearest tenth.
=
1
3
2
5
+
x
3
4
4
6
5
8
6
12
7
14
8
15