I need help please thank you

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

The function f(x) is shown in this graph the function g(x)=6x

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?