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

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?