Plug in (-1) for x. It will look like this:
f(-1) = 4 *(-1) - 3
four times negative 1 equals negative 4, so...
f(-1) = -4 - 3.
negative four minus three is easiest to figure out with a number line...it equals negative seven. So:
f(-1) = -7. And you're done!
here is another one i have no idea how to do. if f(x)=4x-3 how do I find f(-1)
4(-1) - 3
four times negative 1 is negative 4.
So what's
-4-3
?
Matt
To find f(-1) for the function f(x) = 4x - 3, you simply substitute -1 for x in the function.
f(-1) = 4(-1) - 3
Now, evaluate the expression:
f(-1) = -4 - 3
Performing the operations, we have:
f(-1) = -7
Therefore, f(-1) is equal to -7.
To find f(-1) using the function f(x) = 4x - 3, you simply replace x with -1 in the function and evaluate the expression.
Step 1: Replace x with -1 in the function f(x).
f(-1) = 4*(-1) - 3
Step 2: Simplify the expression by performing the multiplication and subtraction.
f(-1) = -4 - 3
Step 3: Perform the subtraction to get the final answer.
f(-1) = -7
Therefore, the value of f(-1) is -7.