Which function could be shown in the graph below?

Can somebody me out with this question

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.