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What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

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?

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?