how do I turn a factored form into standard form?

Ineed with number 17 i don’t get it at alll

Which graph corresponds to the function f(x) = x2 + 4x – 1?

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?