The one way journey is 45 miles
Here, we want to get the number of miles for the one way trip
To calculate this, we have to look at the triangle formed on the left
By calculating this distance, we have the value of the number of miles traveled on a leg
We need the base and height of the triangle
The base is the x-axis change from the orgin while the height is the y-axis change from the origin
Looking at the graph, we can see that this value moves from 45 miles to 0 miles
So, the distance traveled is 45 miles on a leg of the journey