What the distance between -45 and -98

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 point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

What is the period of the sinusoidal function ?