Identifying Variables Bellwork 4. IV = amount of light DV = # of eggs laid Control = group 1 on normal light Schedule 5. IV = humidity level DV = height of tree Control = tree in normal conditions IV = concentration of salt solution DV = plant height Control = plant given pure water 2. IV = temperature DV = germination time Control = group 1 at room temp 3. IV = amount of food DV = weight Control = group fed once a day

Graphing Review WCHS Biology

Independent variable (x) dependent variable (y) Y Y X Y X

Plotted data Axis labels (with units) Independent variable Dependent variable Units scale/spacing ⅔ ¾ Title Independent then dependent Key → (include when you have more than 1 set of data)

**SAME** Up Increases Increases also Down decreases **OPPOSITE**

INDIRECT DIRECT

INDIRECT DIRECT