Please help, you can answer the first question and give me an explanation and I’ll do the rest :(

Match each function with its rate of growth or decay

Nine more than four times a number is the same as one less than twice the number. find the number?

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice