Answer:


Step-by-step explanation:
Given
-- Mean of T-shirts
-- Standard deviation of T-shirts

Solving (a): The mean of the revenue 
To solve this, we use:

This gives:


Solving (b): The standard deviation of the revenue 
To solve this, we use:

This gives:



Answer:
x-intercept(s): (
−
8
,
0
)
y-intercept(s): (
0
,
2
)
Step-by-step explanation:
To find the x-intercept, substitute in 0 for y and solve for x
. To find the y-intercept, substitute in 0 for x and solve for y.
Answer:
1) undefined
2) 0
Step-by-step explanation:
Slope formula:

Problem 1:
(x1, y1) = (-7, 8)
(x2, y2) = (-7, -6)
Plug those 2 points into the slope formula and solve:

Here, you can't divide by 0, so this slope is undefined. An undefined slope would make a completely vertical line on a graph. In this case, the equation of the line would be just:

Problem 2:
(x1, y1) = (-9, -8)
(x2, y2) = (3, -8)

The slope is 0, and that would make a horizontal line on a graph. The equation would be:

You don't actually need to fully work out the slope that way. If you ever have 2 points with the same x-coordinate, the slope has to be undefined. If you ever have 2 points with the same y-coordinate, then the slope has to be 0, assuming it's linear of course. You can see that in the points given, the first 2 have the same x and the second 2 have the same y.
H (-7) = (-7)^2 -5 = 49-5 = 44