∴ xy = k (constant). Web the phrase “ y varies inversely as x” or “ y is inversely proportional to x” means that as x gets bigger, y gets smaller, or vice versa. Web if x varies inversely as y, and x = 11 when y = 15, find x when y = 3. Is the total cost to fill a car gas tank a direct or. Web if y varies inversely as x and x=−3 when y=3 , find y when x=18. Answer by earlsdon (6294) ( show source ): 55 identify as a direct variation, inverse variation or neither. Divide both sides by 15. Multiply both sides by 2. Web if y varies directly with x, then we can also say that x varies directly with y.
It's not going to be the same constant. Web the phrase “ y varies inversely as x” or “ y is inversely proportional to x” means that as x gets bigger, y gets smaller, or vice versa. It's not going to be the same constant. We have to find x when y = 32. If y varies inversely as x and x=−3 when y=3 , find y when x=18. (i) if x = 20 and y = 600 ∴ xy= 20×600= 12000 ⇒ k= 12000 when x =400, then from eq (i). (c) find y when x = 9. Given that y=2 for x=1. Y×400= k ⇒ y×400 =12000. Xy = 10y = y = × = × = k is constant. Now plug in y=15 to find x.
