Which statistical measure changes when every number in the data is increased by 10

Which of the following represents the range of the graph of f(x) below

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?