Como aser el numero 15 con las palabras tally marks

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.

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')