## How do derivatives affect the shape of a graph?

4a shows a function f with a graph that curves upward. As x increases, the slope of the tangent line increases. Thus, since the derivative increases as x increases, f′ is an increasing function. We say this function f is concave up.

**What is the derivative of a corner on a graph?**

A corner is one type of shape to a graph that has a different slope on either side. It is similar to a cusp. Here, the derivative at x=0 is undefined, because the slope on the left side is 1 , but the slope on the right side is −1 .

**What is derivative of graph?**

This derivative is a general slope function. It gives the slope of any line tangent to the graph of f. For instance, if we want the slope of the tangent line at the point (−2, 4), we evaluate the derivative at the x-coordinate of this point and get f (−2) = −4.

### Why are corners not differentiable?

A function is not differentiable at a if its graph has a corner or kink at a. Since the function does not approach the same tangent line at the corner from the left- and right-hand sides, the function is not differentiable at that point. The graph to the right illustrates a corner in a graph.

**How are derivatives related to the shape of a graph?**

State the first derivative test for critical points. Use concavity and inflection points to explain how the sign of the second derivative affects the shape of a function’s graph. Explain the concavity test for a function over an open interval. Explain the relationship between a function and its first and second derivatives.

**How to describe the shape of a graph?**

At each point x, the derivative f′(x) > 0. Both functions are decreasing over the interval (a,b). At each point x, the derivative f′(x) < 0. A continuous function f has a local maximum at point c if and only if f switches from increasing to decreasing at point c.

## What does the derivative of f ( x ) look like?

The corresponding derivative function (graph # 3) looks like the graph of the tangent function of a circle (though flipped vertically for some reason). Reply to ϟ 2-XL ϟ’s post “In this video, it looks like the graph of f (x) is …”

**What does the graph of f ( x ) look like?**

In this video, it looks like the graph of f (x) is basically a circle limited to the domain of [0, pi]. The corresponding derivative function (graph # 3) looks like the graph of the tangent function of a circle (though flipped vertically for some reason).