Write an equation in point-slope form of the line that passes through the given point and with the given slope m. (-2,1); m=4

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

Having a hard time understanding this question (see attachment).