If f (x) = 1/2x, what is f (7.6) ?

Ok so f (x) basically means the same thing as the variable y (if you were to graph).

f (x)

Is basically saying if x is whatever (in this case 7.6), then f (x) is whatever the y value would be. When it states f (7.6), it is basically saying that x=7.6.

So now that we understand that x=7.6, we can substitute the value of x into the equation.

f (7.6) = (1/2) * (7.6)

f (7.6) = (1/2) * (3/5+35/5)

f (7.6) = (1/2) * (38/5)

f (7.6) = 38/5

I hope that made sense! Good luck!