Question

What is the value of f(-1) when f(x)=2x+2? F(-1)=?

Answer 1

Here is your function:

`f(x)=2x+2`

You're looking for f(-1). To get your answer, you have to replace all the x's with -1.

Here is your new equation:

`f(-1) = 2(-1)+2`

Multiply 2 by -1

`2 * -1 = -2`

Remember:

MULTIPLYING

• Positive(+) times negative(-) is equal to negative

• Positive(+) times positive(+) is equal to positive

• Negative(-) times negative(-) is equal to positive

• Negative(-) times positive(+) is equal to negative

DIVIDING

• Positive(+) divided by positive(+) is equal to positive

• Positive(+) divided by negative(-) is equal to negative

• Negative(-) divided by positive(+) is equal to negative

• Negative(-) divided by negative(-0 is equal to positive

Since you're multiplying a negative number by a positive number, the answer will be negative.

Here is your new equation:

`f(-1) = -2+2`

Add -2 and 2:

`-2+2 = 0`

That means your answer is 0

↓

`f(-1)=0`

If you have any questions, feel free to ask in the comments! :)