Use the residual plot to analyze the result of the correlation. 0.8
0.6 -
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0
Residual
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-0.4 -
-0.6
-0.8 -
-1 -
-1.2
-1.4-1
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This is not a good model because the residual plot becomes thicker on one end.
This is a good model because the residual plot is not an obvious pattern and does not become thicker toward one of the ends.
This is a good model because the residual plot shows an obvious pattern.
This is not a good model because the residual plot has an obvious pattern.

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages