A 20-mile road runs between Buzzardtown and Dry Gulch. Each town has a gas station, but there are no gas stations between the towns. Let x be the distance in miles from Buzzardtown, measured along the road (so 0≤≤20), and () be the distance in miles to the nearest gas station. Make a table of values that includes entries for x = 7, x = 9, and x = 16, and then draw a graph of (). The graph should have a vertex at (10, 10).