Question 565997
solution:  y=xk (where k is the constant)
             subtitute the values for x and y
           12=4k
             divide both side by the co-efficient of k
           12/4=4k/4
             k=3
             the law connecting the two variables : y=3x
          when x = 25
            y = 3x
             y = 3(25)
               y = 75
      the value of y =75