x is the temperature and y is the number of swimmers. If there are 80 swimmers, then y = 80 instead of x = 80
This is how Corey should have solved
y = 1.505*x - 88.21
80 = 1.505*x - 88.21 <--- replace y with 80
1.505*x - 88.21 = 80
1.505*x = 80 + 88.21 <--- add 88.21 to both sides
1.505*x = 168.21
x = 168.21/1.505 <--- divide both sides by 1.505
x = 111.767
x = 111.8
If there are 80 swimmers at the pool, then the possible outside temperature is roughly 111.8 degrees F. This temperature seems awfully large, so it's possible that Corey's regression equation has limited scope; in other words, it isn't too useful if x is outside a given interval.
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
l(x) - m(x) = 5x² - 7y² + 4xy - [ -10x² + 9y² - 12xy + 4]
= 5x² - 7y² + 4xy + 10x² - 9y² + 12xy - 4
= 5x² + 10x² - 7y² - 9y² + 4xy + 12xy - 4 {Combine like terms}
= 15x² - 16x² + 16xy - 4
Answer:
Step-by-step explanation:
Given
Required
The line equation
First, calculate the slope (m)
The equation is then calculated as:
Open bracket
Multiply through by 2
