# Thread: Sketching a curve

1. ## Sketching a curve

Hi I have worked through this many times but I am absolutly clueless - when it comes to making sure what I am doing is right. I have a function to graph using all the steps

I have attepmted some of it - I need further guidance. Please have a look at attachment and tell me what I've got is right or wrong- if incorrect please tell me what is worng and how to go about it. Ta

2. ## Re: Sketching a curve

Originally Posted by vidhi96
Hi I have worked through this many times but I am absolutly clueless - when it comes to making sure what I am doing is right. I have a function to graph using all the steps
Step #1 should be $x\ne 3~\&~x\ne 0.$

Step #2: $f(-x)\ne -f(x)=\frac{-1-5x}{x^2-3x}$

3. ## Re: Sketching a curve

i thought you only replace x with -x and evaluate to see what you end up with. Isn't it?

4. ## Re: Sketching a curve

Originally Posted by vidhi96
i thought you only replace x with -x and evaluate to see what you end up with. Isn't it?
$\text{If }f(x)=\frac{1+5x}{x^2-3x}\text{ then }f(-x)=\frac{1-5x}{x^2+3x}\ne -f(x)=\frac{-1-5x}{x^2-3x}$

5. ## Re: Sketching a curve

This throws me everytime- so basically you take - sign out and see what happens to original function and in this case numerator changes sign but denominator doesn't so function is neither . Am I correct?