Is a graph increasing decreasing or constant

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

Look at attachment. has all info needed. need