By definition the control in a science experiment is a sample that remains the same throughout the experiment. The control must remain the same or equal at all times in order to receive accurate results. You can have as many controls as necessary to achieve results.
Graphs are often an excellent way to display your results. In fact, most good science fair projects have at least one graph. For any type of graph: Generally, you should place your independent variable on the x-axis of your graph and the dependent variable on the y-axis.
Reflections are mirror images. Think of folding the graph over the x-axis. On a grid, you used the formula. (x,y) â (x,-y) for a reflection in the. x-axis, where the y-values were negated. Keeping in mind that y = f (x), we can write this formula as. (x, f (x)) â (x, -f (x)).