2 points. You answer this with the vertical line test. There are two pairs of points with the same x-axis, so they make two vertical lines. For it to be a function, it must pass the vertical line test, so no two points have the same x-axis. I hope this helps :)
Answer:
Decreasing the sample size decreases the width of the confidence interval.
Step-by-step explanation:
-Let s be the sample standard deviation and
be the sample mean.
#We calculate the 95% confidence interval for the sample size 100 as below:

#we then calculate the confidence interval of sample size =50 and of similar mean and standard deviation:

#Notice that the smaller sample(n=50) has a narrower confidence interval.
Hence, decreasing the sample size decreases the width of the confidence interval.
Answer: No Solutions exist
Step-by-step explanation:
We have the following system of equations

Rewriting the second equation we have:

Now we multiply the first equation by -3 and add it to the second equation

---------------------------------

Equality is not satisfied. Then the system has no solution
45% right if .5 x 90 = 45 and as a percentage it would be 45%
Answer:
2+2=4 and 3+1=4
Step-by-step explanation:
Hope this Helps! :)