Y is the output of x, which is the input. So y= x + 2, y is the result of x + 2. Y is the dependent variable, and x is the independent constant.
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Well, look for a continuing pattern. Once you find one that makes sense for each value, write it into an equation....look at example below x- 2,4,6,8 y- 4,16,36,64 the rule for this function is y=x squared.
how you get x to equal y. it is usually in a graph
A function is a rule which assigns exactly one output f(x) to every input x.
Remember in multiplication that A x B is the same as B x A? Well using this rule we can write that 13 x 2 = 26 and 2 x 13 = 26.
The rule, using a polynomial function of the lowest order is Un = (12n3 - 36n2 - 145n + 413)/25