What is the formula for finding the area of a circles sector

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.