Derive the equation of the parabola with a focus at (−7, 5) and a directrix of y = −11.

Always make the independent variable the x axis and the dependent variable the y axis when you are graphing or making a scatter plot. this is just the standard procedure so people can easily read your graph and interpret what it means. then remember we always input an independent variable, the answer you get when you do this is the dependent variable, or the output. an easy way to remember is that the output is dependent on what you input. just like a vending machine, the output is dependent on how much money you input. so now read back though your choices to see which one has the independent variable on the x axis and as the input.