Answer:
Shannon has to make 41 trips to cycle a total of 50 kilometers.
Explanation:
Given that
Shannon has cycled 9 kilometers this year
Let x be the number of trips that Shannon will make during the year
As she cycles 1km per trip, the total distance in trips will be: 1x
She has to cycle 50 kilometers in a year so the equation for this problem is:

Solving this equation will give us the number of trips she has to make

Hence,
Shannon has to make 41 trips to cycle a total of 50 kilometers.