Find the slope with points -5,0and 5,-8

What is the total surface area of this square pyramid?

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top