Question

When you have an equation in two variables, such as
y = 2x + 1, x is called the independent variable and y is called the dependent variable. The reason we call these variables by these names is that the value of y depends on the value of x, but the value of x may be any number provided it is an element of the equation’s domain.

An equation in two variables can also be expressed as a function. To express an equation as a function equation, you can replace the dependent variable y with the notation f(x). In this example the equation y = 2x + 1 can be written as f(x) = 2x + 1 or f : x –> 2x +

Answer 1

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