Question

If the point (4,-1) is a point on the graph of f, the f(_)=_

Answer 1

(4,-1) means x = 4 and y = -1

since every point is of the form (x,y)

Answer 2

it turns out that y = f(x)

so if x = 4 and y = -1 then


y = f(x)

-1 = f(4) ... plug in x = 4 and y = -1

f(4) = -1

Answer 3

x is the input of the function
y is the output of the function

Answer 4

Thanks that makes a lot more sense now

Answer 5

you're welcome