What’s the answers ?

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.

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

What is the missing step in this proof ?