The cost c of printing a magazine is jointly proportional to the number of pages p in the magazine and the number of magazines printed m
Write an equation that express this joint variation (use k for constant proportionality)
The equation that expresses this joint variation is:
c = kpm
The equation that expresses the joint variation between the cost (c), number of pages (p), and number of magazines printed (m) is:
c = k * p * m
where k represents the constant of proportionality.