Answer:
Third option is correct. The total length of biking trial is 14 units.
Explanation:
It is given that the trail starts at P(−3, 2) and goes to Q(1, 2). It continues from Q to R(1, −1) and then to S(8, −1).
The distance formula is

We have to find PQ, QR and RS.



The total length of h trail is



Therefore total length of biking trial is 14 units.