1. Which equation is not an example of a direct variation? A. y = x+1
C. y = 4x D. y = -9x
B. y = x
2. Which equation is not an example of a direct variation?
A. y = x
B. 2x + 3y = 0 C. y = x D. 5x + 6y = 30
Name the constant of variations(k) for each equation.
3. y = 5x
4. y = x
5. y = x
Write a direct variation equation that relates the two variables. Then solve.
6. Suppose y varies directly as x, and y= 16 when x = 8. Find y when x = 16.
7 Suppose y varies directly as x, and y = 21 when x = 3. Find x when y = 42.
8. Suppose v varies directly as g, and v = 36 when g = 4. Find v when g = 11.
9. Suppose a varies directly as b, and a = 7 when b = 2. Find b when a = 21.