Activities Guided Practice 1 1 A. Write the equation of variation for each of the following statements. Follow the given example. Example: z varies jointly as x and y. The equation of variation is z = foxy. 1. v varies jointly as u and t. 2. m varies jointly as v and w. 3. a varies jointly as b and the square of c 4. The area (A) of a parallelogram varies jointly as its base (b) and the altitude (h). 5. The volume (V) of a rectangular prism varies jointly as the length (1), width (w), and the height (h).​