4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm

what is the independent variable, dependent variable and three constant variables?

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Explanation:

All I know is that:

Control variable is what you keep the same throughout all of the tests.

Dependant variable is what you observe from the test

Independent variable is what you are altering in the test