Are the graphs of y = -5x + 9 and 5x + y = -21 parallel, perpendicular, or neither? Explain. I need some help please

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?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

Ineed to find the answer to number 2