# How to write absolute value as a piecewise function whose graph

Well, there are some real-life practical examples for studying piecewise linear functions. A flat income tax would tax people at the same rate regardless of their income. In this format, all changes seem to be the opposite of what you would expect.

Well, it used to be that you had to apply the inverse of the constant anyway. Since it is added to the x, rather than multiplied by the x, it is a shift and not a scale. For which incomes s would the flat tax and the graduated tax be the same? If you remember this, then the decision is easy.

Graph of flat versus graduated taxes Note that the flat tax rate has a constant slope of. Any vertical translation will affect the range and the leave the domain unchanged.

It will also play a very big roll in Trigonometry Math and Calculus Math,or These are both explained above.

For an explanation of why, read the digression above. The 3 is not grouped with the x, so it is a vertical scaling. Horizontal changes are the inverse of what they appear to be so instead of multiplying every x-coordinate by two, the translation is to "divide every x-coordinate by two" while leaving the y-coordinates unchanged.

We know that they are shifts because they are subtracted from the variable rather than being divided into the variable, which would make them scales.

So, if you take the notation above and solve it for y, you get the notation below, which is similar, but not exactly our basic form state above. The answer is not to "divide each x-coordinate by two and add three" as you might expect. And, to make matters worse, the "x divided b" that really means multiply each x-coordinate by "b" has been reversed to be written as "b times x" so that it really means divide each x by "b".

This is where my comment earlier about mathematics building upon itself comes into play. The correct transformation is to "multiply every y-coordinate by two and then add five" while leaving the x-coordinates alone. Since it is added, rather than multiplied, it is a shift and not a scale.

This means that the proper translation is to "divide every x-coordinate by two and add three-halves" while leaving the y-coordinates unchanged. However, note the characteristic of the graphs as income increases.

In this format, the "a" is a vertical multiplier and the "b" is a horizontal multiplier. They are still the opposite of what you think they should be. Instead of dividing by "a", you are now multiplying by "a". Our income tax is based on a graduated tax calculation.

This makes the translation to be "reflect about the x-axis" while leaving the x-coordinates alone. The concepts in there really are fundamental to understanding a lot of graphing.

Earlier in the text section 1. The reason is that problem is not written in standard form.

Apply the same translation to the domain or range that you apply to the x-coordinates or the y-coordinates.

The "d" and "c" are vertical and horizontal shifts, respectively. Do you "add five to every y-coordinate and then multiply by two" or do you "multiply every y-coordinate by two and then add five"?

Vertical changes are affected the way you think they should be, so the result is to "multiply every y-coordinate by three" while leaving the x-coordinates alone.Piecewise Deﬁned Functions Absolute value The most important piecewise deﬁned function in calculus is the absolute Graph of the absolute value function.

Another interpretation of the absolute value function, and the one that’s most important for calculus, is that the absolute value of. • Know how to evaluate and graph piecewise-defined functions. • Know how to evaluate and graph the greatest integer (or floor) function.

THE ABSOLUTE VALUE FUNCTION Let fx()= x. We discussed the absolute value function f Piecewise-Defined Functions; Limits and Continuity in Calculus) f has a jump discontinuity at a, or x = a. Engaging math & science practice! Improve your skills with free problems in 'Writing Basic Absolute Value Equations Given the Graph' and thousands of other practice lessons.

In math, a piecewise function (or piecewise-defined function) is a function whose definition changes depending on the value of the independent variable.

A function f of a variable x (noted f (x)) is a relationship whose definition is given differently on different subsets of its domain. The graph of this piecewise function consists of two rays, is V-shaped, and opens up.

GRAPHING ABSOLUTE VALUE FUNCTIONS Graph the function. Then identify the vertex, tell whether the graph opens up or down, and tell whether the Write an absolute value function whose graph is the V-shaped outline of the sides of the building.

Continuous Functions. A function is continuous when its graph is a single unbroken curve.

How to write absolute value as a piecewise function whose graph
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