Answer :

Let the missing values be x, y, z as shown



Let ‘a’ be a value in Sale and ‘b’ be a value in Commission


As there is direct variation between sale and communication


a b


a = kb


= k(constant)


When sale is 50 commission is 10 i.e. a = 50 and b = 10


= = 5 = k


k = 5


For all value of sale and commission the constant k does not change since it is direct variation therefore


= = = k = 5


Consider = 5


x = 50


Consider = 5


y = 125 × 5


y = 625


Consider = 5


z = 165


The table becomes



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