



 
Hi Rita, In order for any ordered pair (x, y) to be a point on the graph of a function or relation, the values of x and y must satisfy the equation. This means that when the values are substituted into the equation, you get a true equality statement. For example, (3, 5) lies on the graph of y = 2x + 1 because by substitution we get Similarly, (3, 5) does NOT lie on the graph of y = 4x + 3 because by substitution we get In your question, simply substitute your x value of 2 into the equation, and exchange y with "b".  


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