Which equation represents the line with an x-intercept of -1 and a slope of 4?

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.

I’m confused on how to work the pie charts