The angle of YWZ is equal to the angle of YWX, and angle WYX is also a right angle due to the congruency of segments WZ and WX.
Every triangle has an angle total of 180 degrees, so angle WXY is equal to
180 - (WYX + YWX)
180 - (90 + 17)
73
Angle WXY has an angle value of 73 degrees.
Y/x=k
when y=9, then x= -3
9/-3=-3
⇒ k= -3
1 because 1 and 3/4 is very close which is majority
-2.5 is the slope and the equation is y=-2.5+9 hope this helps