2. Line & is tangent to the graph of y = x - at the point Q as shown in the figure on the right. a. Find the x-coordinate of point Q b. Write an equation for the line ? (0, 20) C. Suppose the graph of y = x - 500 represents a hill, with x and y measured in 500 feet. There is a 50-foot tree growing vertically at the exact top of the hill. Does a spotlight at the point (0, 20) shining along line f shine on any part of the tree? Explain your reasoning