You have two numbers. If you double the first number and add it to the second number, the sum is 10. Let x represent the first number and let y represent the second number. Write an equation showing the relationship between x, y, and 10. Draw and label a set of x- and y-axes. Plot at least five points on this coordinate plane that make the statement and your equation true. What do you notice about the points you have plotted? List ten points that do not make the statement true. Using a different color, plot each point in the same coordinate plane. What do you notice about these points compared to your first set of points?