The equation that represents the given expression can be written as y = -3x. Here, "x" represents the input (the independent variable) and "y" represents the output (the dependent variable). The function states that the output is equal to -3 times the input.
To find the input when the output is 14, we can substitute y = 14 into the equation:
14 = -3x
Now, we can solve for x by isolating it on one side of the equation:
Divide both sides of the equation by -3:
14 / -3 = x
This simplifies to:
x = -14/3
Therefore, the input when the output is 14 is -14/3.