A marketing researcher is testing out new names for a hair product. She asks 40 women to pick the name of the product that they
would be most likely to buy out of a list of 4 names. Could she use a dotplot to describe her results?
1 answer:
Answer:
Yes, she can use a dotplot to describe her results.
Step-by-step explanation:
A dot-plot is a chart where each data is represented as a dot and it's values fall in discrete bins.
She can set a graph where 4 names of the product is represented on the horizontal axis and for each woman giving a name of the product, a dot is placed on top of the horizontal axis.
A sample dot-plot for this study is attached.
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Answer:
B. y=1/3x+4
Step-by-step explanation:
Hi there!
We are given the line PQ and we want to find the line that is perpendicular to it
Perpendicular lines have slopes that are negative and reciprocal. When they are multiplied together, the result is -1
So first, let's find the slope of the line PQ
The point P is given as (-8, 7) and the point Q is given as (-4, -5)
The formula for the slope calculated from two points is where (
) and (
,
) are points
We have the needed information for the slope, but let's label the values of the points to avoid any confusion
x1=-8
y1=7
x2=-4
y2=-5
Now substitute into the formula (m is the slope, and remember: the formula contains SUBTRACTION):
m=
simplify
m=
add
m=-12/4
divide
m=-3
So the slope of the line PQ is -3
As said above, perpendicular lines have slopes that have a product of -1
So to find the slope of the line perpendicular to PQ, use this formula:
-3m=-1
divide both sides by -3
m=1/3
The only line that has a slope of 1/3 is B (y=1/3x+4), so B is the answer.
Hope this helps!