In the xy-plane, the graph of a linear equation of the form y mx b = and the graph of an exponential equation of the form y ab = x both contain points ( ) 1, 3 and ( ) 2, 4. If the point ( ) r s, is on the graph of the linear equation and the point ( ) r t, is on the graph of the exponential equation, where 0< <4 r and s t > , which of the following must be true?.