y=2/3x ; which of the ordered pairs satisfy the following equation

Question

Which of the ordered pairs satisfy the following equation?    y=2/3x

(14,21)

(42,28)

(21, 3/2)

(21,14)

(7,14)

(28,42)

Answer 1

y = (2/3)x

In (21,14), x = 21 and y = 14, 
to be a solution, it must be a true statement,
once you substitute the values in for x and y

y = (2/3)x
14 = (2/3)(21) {substituted 21 in for x and 14 in for y}
14 = 14 {multiplied 2/3 by 21}

That is a true statement, therefore
(21,14) is a solution to y = (2/3)x
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Answer 2

 

y = (2/3)x 

In (42,28), x = 42 and y = 28,  
to be a solution, it must be a true statement, 
once you substitute the values in for x and y 

y = (2/3)x 
28 = (2/3)(42) {substituted 42 in for x and 28 in for y} 
28 = 28 {multiplied 2/3 by 42} 

That is a true statement, therefore 
(42,28) is a solution to y = (2/3)x