The product of a number and four increased by 16 is -2

Which graph represents the equation y =4x

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?

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?