Suppose we select an SRS of size n = 100 from a large population having proportion of successes. Let p-hat be the proportion of successes in the sample. For which value of p would it be safe to use the Normal approximation to the sampling distribution of p-hat? (a) 0.01 (b) 0.09 (c) 0.85 (d) 0.975 (e) 0.999

By vertical line it seems you mean one like the one in the graph above. vertical lines go up and down forever and are known as being undefined (just extra info).the equation of a vertical line is simply x = __ which would be the x value at where it crosses the x axis. like shown above the vertical line crosses the x axis at (6,0) so its equation is x = 6.hope this c: