50km to 80km is 30km
10c to -80c is -90c
and since it linear (Which means the change is constant or the same)
every 10 km show a -30c decrease
so
60 km is -20c
70km is -50c
answer is c
Answer:
y-8
If Tia is 8 years younger than Annette and Annette is y years old, you just take y and subtract 8.
Umm i not that sure but i think its a