### How to Find the formula for a piecewise function from a graph « Math :: WonderHowTo

Need to calculate the domain and range of a graphed piecewise function? Learn how with this free video lesson. From Ramanujan to calculus. Overview To limit the domain or range (x or y values of a graph), you can add the How would you create a piecewise function in one line. How To: Find the formula for a piecewise function from a graph. Find the formula for a piecewise function from a graph. By getexcellent; 5/26/

So let me give myself some space for the three different intervals. Now this first interval is from, not including -9, and I have this open circle here. Not a closed in circle.

## Introduction to piecewise functions

So not including -9 but x being greater than -9 and all the way up to and including I could write that as -9 is less than x, less than or equal to That's this interval, and what is the value of the function over this interval?

Well we see, the value of the function is It's a constant -9 over that interval. It's a little confusing because the value of the function is actually also the value of the lower bound on this interval right over here.

It's very important to look at this says, -9 is less than x, not less than or equal. If it was less than or equal, then the function would have been defined at x equals -9, but it's not. We have an open circle right over there. But now let's look at the next interval.

The next interval is from -5 is less than x, which is less than or equal to Over that interval, the function is equal to, the function is a constant 6. It jumps up here.

Sometimes people call this a step function, it steps up. It looks like stairs to some degree.

## Piecewise Integration: Definition & Examples

Now it's very important here, that at x equals -5, for it to be defined only one place. Here it's defined by this part.

It's only defined over here. Before we cover a few examples of how to integrate piecewise functions, there are some steps that can help keep things going smoothly. These steps are just to keep you from mixing up breakfast and dinner, and for making sure that you're working with the right expressions of piecewise functions for different x values: Break your piecewise integration into two separate integrals based on the boundaries of the definite integral: If you're having trouble seeing it, try using a number line to visualize which expression applies based on the x-values.

### How to Figure out the domain & range of a piecewise function « Math :: WonderHowTo

Evaluate each integral on its own then add the results. As long as you know how to integrate a function and keep close track of your x-values, you should be in good shape. Okay, let's work through a few examples.

Example 1 Example 1 shows a piecewise function. We can integrate this function piecewise by using separate definite integrals with the corresponding expressions. We start with a general expression for our definite integral, which is We can break this into two separate integrals based on the boundaries of the definite integral.

### Introduction to piecewise functions | Algebra (video) | Khan Academy

Let's use a number line to identify which expression applies based on the x-values. Looking at the number line, we see how we can set up two integrals based on the x-boundaries.

The piecewise integrals are We evaluate these integrals and then add the results.