Is the following equation an example of direct variation?

y equals 5 x

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?