Pl help it’s for a grade I will give you if right

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2