The graph shows the relationship between the weights of 5 packages and the shipping charge for each package. Is the relationship represented by the graph a function?
(1, 2.5), (2.5, 3.5) , (3, 3.5) , (4, 4) , and (4.5, 4.5) are the points.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

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%

Pranza plotted point a in the coordinate plane below.