# Direct Variation - Page 5

Questions

- Is #-x+4y=-2# a direct variation equation and if so what is the constant?
- How do you write a direct variation equation that relates x and y if y = -8 when x = -2 then how do you find x when y = 32?
- How do you write direct variation functions given f(2) = 8 and n = 4?
- If y varies directly as the square of x. When x = 2, y = 20, how do you find y when x = 4?
- Is #2x + y = 4# a direct variation equation and if so what is the constant?
- The variables x=9 and y=15 varies directly. How do you write an equation that relates the variables and find x when y=-5?
- If y varies directly with x, and if y = 12 when x = 3, how do you write the direct variation equation?
- For the direct variation y = 3 when x = -2, how do you find the constant of variation and find the value of y when x = 3?
- Is #2x - 5y = 0# a direct variation equation and if so, what is the constant of variation?
- Is #2x+3y=0# a direct variation equation and if so, what is the constant of variation?
- How do you graph the direct variation equation #y=5/2x#?
- How do you write a direct variation equation that passes through the point (5,-6)?
- If y varies directly with x, and if -8 = y and -2 = x, how do you find x when y= 32?
- If #y=166# when #x=83#, what is #y# when #x=23#?
- The cost of pens varies directly with the number of pens. One pen costs $2.00. How do you find k in the equation for the cost of pens, use C=kp, and how do you find the total cost of 12 pens?
- How do you write the direct variation of (2, 10)?
- If y varies directly with x, and y = 6 when x = 20, how do you write the direct linear variation equation?
- Is #y = x +2# a direct variation equation and if so what is the constant?
- How do you write a direct variation equation if y=36 when x=9, and how do you find x when y=52?
- Suppose r varies directly with t and that r = 25 when t=25 . What is the value of r when t = 7?