If point (4, 5) is on the graph of a function, which equation must be true?

Question

function If point (4, 5) is on the graph of a function, which equation must be true?

Answer 1

Silly you, you did not give us the possible choices!

 

So you will have to solve it yourself, simpy by substituting x=4, y=5 into each one to see which equation is true.