Maths+Algebra+Investigation

Have you ever wondered how police can tell how tall criminals are JUST from finding a footprint?? Amazing!! Let's find out HOW they do it.

Method. Measure your shoeless height (in cm) and your shoeless foot length (in cm). Record your results. Look for any patterns in the data. Notice anything? Try this; For each person, divide their height by their footlength. What do you notice about these results? How many of your footlengths normally fit into your height? How could this be described using a formula in algebra? For footprints with shoes, there is normally 4cm extra shoe for each foot.

APPROXIMATE (using the formula) how tall a suspect would be for a 31cm footprint. How about a 36cm footprint? Work backwards to find the barefoot length first.