Please help, it’s a simple question but I have no clue!

Consider the graph of the exponential function y=3(2)×

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read