We often use the term direct variation to describe a form of dependence of one variable on another. An equation that makes a line and crosses the origin is a form of direct variation, where the magnitude of x increases or decreases directly as y increases or decreases. Direct variation and inverse variation are used often in science when modeling activity, such as speed or velocity.
Sample Problems (5)
Need help with "Direct Variation" problems? Watch expert teachers solve similar problems to develop your skills.
If y varies directly with x and the value of y is 22 when the value of x is 2, find y when x = 5.
A biker's distance traveled on flat terrain varies directly with its traveling time. If the biker has gone 90 miles after 2½ hours, how long will it take him to go 306 miles?