Answer:
41*
Step-by-step explanation:
90*-41*=41*
Hope This Helps;)<3
A one to one function is a function where the output is mapped to a unique input.
Horizontal line test is used to check whether a function is one to one.
SImple,
this line is in the form of y=mx+b..which means that m=slope and b=y-intercept..
Thus, the slope for this line is....

Thus, your answer, A.
-13 = xy + z....subtract z from both sides
-13 - z = xy...divide both sides by y
(-13 - z) / y = x