Please guyss i need help urgent!​

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Solve: 3x+y=6 4x-2y=18 show all work !