Please help! What is the value of x? Image attached

Fiona has to plot a histogram of the given data

There are 85 apples on the big tree, john picked out 15%. how many did john pick out?

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.