Qué número representa el que indica la flecha​

Which term best describes the association between variables a and b

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form