Question

Y=f(x)=-4x find f(x) when x=3

Answer 1

f(x) = -12

Explanation:

The problem here is a simple plug and solve function. "y = f(x)" is just basically saying that y is a function of x. Whatever x-value is plugged in, the function will output a number.

In this case, the function is -4x, and the x value is 3. So, it is a simple multiplication problem;

y = -4x

y = -4(3)

y = -12

Answer 2

The answer Is........ -64