Playing with Amplitude And Period
Use (Shift + Click&Drag) to pan window. Use (Shift + Scroll) to zoom. Drag the sliders to change values. Once a slider is selected, you can use the arrows on a keyboard to move the value small amounts. Want to reset? check the top right hand corner. Once you have had a play, take a challenge. - See if you can find a graph that fits the points for a specific challenge.