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A function is linear if one variable is directly proportional to the other.

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Q: How can you tell something is a linear function?
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How do you find a linear function?

By finding something who's behavior is represented by a linear function and graphing it.


How can you tell a linear function from an equation?

An equation is a statement that two things are equal. A function is a rule or process that gives you a value if you give it something in its domain (the set of things on which it is defined) as an argument. Functions on numbers that are defined by a rule can usually be expressed by an equation. A linear function is one that can be defined by a linear equation.


How do you do linear functions?

By finding something who's behavior is represented by a linear function and graphing it.


What is linear exploration?

It is searching [for something] in a straight line.Perhaps you mean linear extrapolation? That is when the extrapolation assumes that the function is a straight line.


How can you tell if a function is linear or non linear?

If it can be written in the form y = mx + c where m and c are constants [or, equivalently, ax + by = k where a, b and k are constants] then y is a linear function of x.


How to tell the difference of a linear and non linear function without it on a graph?

A linear function, of a variable x, is of the form ax+b where a and b are constants. A non-linear function will have x appearing in some other form: raised to a power other than 1, or in a trigonometric, or exponential or other form.


Is linear function the same as linear equations?

No a linear equation are not the same as a linear function. The linear function is written as Ax+By=C. The linear equation is f{x}=m+b.


What is the end behavior of a linear function?

Assuming the domain is unbounded, the linear function continues to be a linear function to its end.


Is an exponential function linear?

No. An exponential function is not linear. A very easy way to understand what is and what is not a linear function is in the word, "linear function." A linear function, when graphed, must form a straight line.P.S. The basic formula for any linear function is y=mx+b. No matter what number you put in for the m and b variables, you will always make a linear function.


Is a linear equation the same as a function?

No a linear equation are not the same as a linear function. The linear function is written as Ax+By=C. The linear equation is f{x}=m+b.


How can you tell if a graph is a linear function?

The word linear means in a straight line. If the graph is a line, it is linear. Also, linear equations are of the first order; they contain a variable but not a square (or higher power) of a variable. If the equation contains x2 it is not linear.


How can you tell if a linear appoximation is too large or too small?

The precision of a linear approximation is dependent on the concavity of the function. If the function is concave down then the linear approximation will lay above the curve, so it will be an over-approximation ("too large"). If the function is concave up then the linear approximation will lay below the curve, so it will be an under-approximation ("too small").