Answer:
Step-by-step explanation:
1 day distance =3.5 miles
2 day distance =3.5*2 miles
3 days distance =3.5*3 miles
4 days distance=3.5*4 miles
5 days distance =3.5*5 miles
5 days is most he can ran
so distance (Y) < = 3.5 * Days (X)
Answer is Y<=3.5*X