In this question , it is given that slope of 5 and a y-intercept of (0,-2) .
Now we have to check out the equation of the line that we are gonna use here.
Here we use the slope intercept form, which is

where m is the slope , which is 5 here and y intercept is b , which is -2 here.
Substituting these values in the equation, we will get

Part b .
Now we have to substitute 0 for y, and find the value of x, that is

Your qn is kind of incomplete. But if you are asking that what is 95 percent confidence intervals, then here it is:-
Answer :-
A 95 precent confidence interval is a range of values that you can be 95% certain contains the true mean of the population. This is not the same as a range that contains 95% of the values. It doesn't quantify variability.
Hey there!

Good luck on your assignment and enjoy your day!
~
Answer:
1, 3, 7, 21
Step by step explanation: