Which is a solution to the equation y=3x+1?
a.
(3, 10)

b.
(2, 6)

c.
(1, 5)

d.
(0, 3)

The correct answer is:  [A]:  "(3, 10)" .

   We are given the equation:

     " y = 3x + 1 "

When "x = 3" (in this equation), "y =10".

Let us plug in "3" for "x" in this equation, and see what "y" equals:

  y  = 3x + 1 ;

  y = 3*(3) + 1 ; 
 
  y =  9 + 1 = 10

So,  Answer choice, [A]:  (3,10) ;  is a solution to the equation, "y = 3x+1" .

The other answer choices are incorrect.