Liam should compare the rates of change of the terms in both sequences. The growth rate of j(x)=1.2^x will quickly surpass the growth rate of h(x)=1.2x.
This statement is accurate because while both sequences have a base growth rate of 1.2, the exponential function (j(x)=1.2^x) grows much faster than the linear function (h(x)=1.2x) as x increases. Initially, for small values of x, h(x) may have larger values than j(x), but as x continues to grow, j(x) will start to surpass and eventually dominate h(x).