Seems like you had your minus signs backwards. Try y = 3 and y = -6
The initial function is slope
=> slope = 7-1/6-0 = 6/6 = 1
Hope this helps you :)
PLEASE HELPPPPP ME PLEASE I DONT KNOW WHAT TO DO ☹️#8
All the points if they lay on top of eachother
if they arent on top of eachother, they can intersect at 2 points