find each equation of direct variation,given that y varies directly with x: y is 21when x is 49

Question

anonymous · Answer

y=(3/7)x

anonymous · Answer

what else ?

anonymous · Answer

bridgetts gross pay her per year(40,000).her net is (27,001)as a result of her payroll deductions.last year bridgetts salery was (37,700).her net is (25,259).write an equation of direct variation indicating bridgetts net pay y as a function of gross pay x.

anonymous · Answer

just substitute in the equation i gave

anonymous · Answer

i don't get it what substiute?

anonymous · Answer

(Here's another problem) the wieght of an object on wenus is directly proportional to it's weight on earth. a 110 lb person on earth would way 99 lb on venus.write an equation of variation indicating a person's weight on venus as a function of weight on earth.