he function f(d) = –3d + 60 gives the remaining life of a flashlight battery, in hours, d days after the start of a hike.

What is the meaning of the y-intercept?


The battery will run out of life 20 days after the start of the hike.


The battery will run out of life 60 days after the start of the hike.


At the start of the hike, the flashlight had 20 hours of battery life.


At the start of the hike, the flashlight had 60 hours of battery life.