Question 258098
the first number in the ordered pair is x and the second is f(x) or y
just plug in each ordered pair until you find one that does NOT work.
f(x)=-2x+5
try 1,3
f(x)=-2(1)+5
f(x)=-2+5
f(x)=3
(1,3)
That works
You are looking for  the f(x) doesn't equal the y of (x,y)
You will get something like 2=4 or something that does equal the other that doesn't work