Creating and managing access rules
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there is no graph... but most chance it's all real numbers
A line is a function ifany line parallel to the y axis meets the line at most once andall points where it does not meet the line are excluded from the domain.
It most certainly can. In fact it can be quite a useful function. If you want to suppress one function, f(x), over part of its domain you could define another function, g(x) that is equal to zero over that part of the domain and then study the function: h(x) = f(x)*g(x) where both are defined = f(x) otherwise. You may want to do this if f(x) is ill-behaved over a part of its domain.
A domain is the x value or values of a set of points of a graph. do not repeat them. It should be written in the following fashion... d={enter x values here with commas between each} The concept of the domain of a function applies not just in algebra, but most areas of mathematics.
y is a function of x iffor each value of x (in the domain) there is a value of y, andfor each value of y (in the range) there is at most one value of x.