Question 414592
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Hi
a) y = k*x and y=10 when x=5, k = 2   find y when x=15. {{{y =2*15 = 30}}}
b) y = k*x and y =5 1/4 when x=3, {{{k = (5.25)/3 = 1.75}}} find x when y=20  {{{20/1.75 = x}}}
c. if the constant of 'direct variation' is 3.75, find x when y=10. {{{10/3.75 = x}}}
d) if y varies directly as x and the point (3,5) is on the graph of the equation describing the relation, find the equation of the variation 
   y = kx
   5 = k*3
   5/3 = k    {{{y = (5/3)x}}} is the equation of the Direct variation