Answered

Harper calculated the slopes of both AB and XY. "That can't be right," she
said to herself after she calculated the slopes. "I got the same answer for both
lines. I must have made a mistake." She ponders the problem, but cannot figure
out what to do. She explains "I used completely different points when I calculated
the slopes. How can the slopes be the same?" she asks.
What do you think? Give Harper some suggestions and advice. Be clear and
complete