Are the ratios 5:18 and 1:2 equivalent?

 No; they are not equivalent.

_____________

Step-by-step explanation:

_____________

Note: The ratio:  " 1:2 " ;  can be written as:  " " ;

         The ratio:  " 5:18 " ; can be written as: " " .

  → " " ;

_____________

 → " " ;

                   → " " ;

_____________

 → " " ;

                   → " " ;

_____________

 → " " ;

_____________

                   → " " ;

_____________

 → " " ;

                   → " " .

_____________

Hope this helps!

Best wishes!

_____________

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.