How do we draw graphs in these kinds of questions?

The graph of y=e^x is transformed as shown in the graph below. which equation represents the transformed function?

The number of volunteers to walk dogs at the local animal shelter last year was 20. this year, the number of volunteers has risen to 50. what is the percent of increase in the number of volunteers?

Atutoring service offers a free one-hour tutoring session. after a client signs up, the next 10 hours of tutoring are billed at a rate of $30 per hour. for all the hours after that, the client receives a discounted rate. if a client pays $664 for 25 hours of tutoring, what is the service's discounted hourly rate? a) $24.50 b) $25.54 c) $26.00 d) $26.56