Someone please help me with this question

Answer:
how many floors the elevator goes down per unit of time
Step-by-step explanation:
not sure what the unit of time is but its seconds or minutes im pretty sure it doesnt say
Answer:
The elevator started at floor 7
Step-by-step explanation:
The y-intercept is when x is 0
In this situation x represents time, so when no time has passes yet y is at 7
This means that the elevator was at floor before any time passed (before it started moving)
hope this helps, lmk if it doesnt :)