Equation through the point (5,9) with a slope of -4

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Explain how to graph a scatterplot and its regression line using a regression calculator.