# Another graph involving differentiation. This time I got j'(2) and j'(3) right, but I need help finding j'(1). Can someone help please?

##### 1 Answer

#### Explanation:

This question is implicitly attempting to test you on the quotient rule.

We're given that

This is just applying the quotient rule formula.

Now, we're being asked to find

*We can draw this relationship since f(x) and g(x) intersect at x = 1.*

*Note that since both f(x) and g(x) are linear functions, we can simply use the slope formula to find their derivatives.*

Now, we plug all this into the formula:

If you need some additional help/practice on using the quotient rule, I'd encourage you to take a look at some of my videos on the subject:

Hope that helps :)