์˜ˆ๋ฅผ ๋“ค์–ดย ย y = x๋ž‘ y =-x+2 ๊ต์ ์€ 1,1 ์ด์ž–์Œ ์ € ์ขŒํ‘œ๋ฅผ ์ฝ”๋”ฉ ์–ด๋–ป๊ฒŒ ํ•จ?