The test variable (independent variable) is the one factor you are changing from trial to trial. The outcome variable (dependent variable) is what changes as a result (the data you collect). Record these on your lab report. Write your hypothesis statement on your lab report. A hypothesis should follow an if/then statement using the variables. How do you think your test variable (independent variable) will affect your outcome variable (dependent variable)? If (test variable changes this way), then (outcome variable will change this way). Gather the materials to conduct your trials. Stack two books or blocks on top of each other. Lay the board or notebook at an angle from the top of the stack to the floor to form a ramp. board proped up on two books