Matematikk - PreCalculus - Function 01 | ![]() |
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A simple visualization of what we call a function. As default you will see a video simulation ('SimV') of a function. Click the pushbutton 'Sim' on the top of the simulation window to select the interactive simulation. You can switch between 'SimV' and 'Sim' at any time. A function is like a machine where we put someting (here called x) into the machine and where someting (here called y) is coming out of the machine. For every input x there can be only one output y. Here we let the input x be a number. As an axample we can tell the machine to let the output always be twice the value of the input. We mark the checkbox 'Function' in the control window. A blue function analyze scheme is shown to the right. In the top row in this blue window we write 2x to tell that the function is y = 2x. We immediately see the graph of this function (a red line). Then we write a number (example 2) in the next line where we see y(...) = . We immediately see that the output y = 4 (the double of 2) and a small sphere (point) and the value x=2 and y= 4 in a yellow box indicating that 2 is the input and 4 is the output. |