Do the values in the table represent a linear function? If so, write a function rule in slope-intercept form. Help please ASAP for a test

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

15 points what is the end behavior of this graph? & what is the asymptote of this graph?

Whats four fifths to the first power