How to get correlation and regression analysis between Corona and the environment

Because of your favorite lemonade it is $3.84 for 3 gallons. write this as an unit rate

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)