Changes

Further, <math>f(1,2)=(1)^{2}+3(2)=1+6=7</math>.  We change the variable and thus alter the value of the function.

Further, <math>f(1,2)=(1)^{2}+3(2)=1+6=7</math>.  We change the variable and thus alter the value of the function.

Sometimes a function can have also a [[parameter]]. A parameter is similar to a variable, but is not written like a variable and is thus more similar to a [[constant]]. For example, if we a function: <math>f(x,y) = x^2 + ay</math>, then <math>a</math> is said to be a [[parameter]]. It does not change like the [[variables]] x and y, but it can nonetheless take different values. It is important to clearly distinguish the two concepts.

Sometimes a function can have also a [[parameter]]. A parameter is similar to a variable, but is not written like a variable and is thus more similar to a [[constant]]. For example, if we a function: <math>f(x,y) = x^2 + ay</math>, then <math>a</math> is said to be a [[parameter]]. It does not change like the variables x and y, but it can nonetheless take different values. It is important to clearly distinguish the two concepts.

The [[set]] of all variables upon which a function acts is said to be the [[domain]].  The set of all values that a function can take due to its domain is called its [[range]].

The [[set]] of all variables upon which a function acts is said to be the [[domain]].  The set of all values that a function can take due to its domain is called its [[range]].

[[category:mathematics]]

[[category:mathematics]]