we are given
For y=4x:
[tex]y=4x[/tex]
we can see that this is a linear function
[tex]y=mx+b[/tex]
and we know that growth of linear function is always constant
because slope is always constant
For [tex]y=4^x[/tex]:
we can see that it is exponential function
because of form
[tex]y=a(b)^x[/tex]:
so, it's growth will be increasing exponentially
graph: