Find the slope for each line

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

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.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.