And Louisa bakes a batch of brownies she is 1/2 cup of chocolate. If she has 3/2 cups of chocolate remaining how many batches of Brownies can Louisa make.

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Precalculus question, image attached.

Atransformation t : (x, y) (x-5,y +3) the image of a(2,-1) is