## tatumlee one year ago Evaluate the function for x=2:f(x)=7x-5 can someone show me how to do this please?

1. SolomonZelman

$$\large\color{black}{ \displaystyle f(x)=7x-5 }$$ This function gives you the output $$f(x)$$ for every value of $$x$$ that you plug into the function. Here, I will give you an *example*. If I wanted to evaluate the function for *x=3*, then this is what I would do: $$\large\color{black}{ \displaystyle f(3)=7\cdot3-5 }$$ $$\large\color{black}{ \displaystyle f(3)=21-5 }$$ $$\large\color{black}{ \displaystyle f(3)=16 }$$

2. SolomonZelman

You need to evaluate the function for *x=2* (not x=3). That means thaty you need to plug *2* instead of *x* into the function f(x). (Just as I did with 3, above, -- but this time with a "2")

3. tatumlee

Would the answer be 9? I did 7 x 2-5 which is 9

4. SolomonZelman

$$\large\color{black}{ \displaystyle f(2)=7\cdot2-5=14-5=9 }$$\ You are exactly right! Good job!

5. tatumlee

Thank you so much!

6. SolomonZelman

yw