Question 1122491
Jose is 10 feet from a mailbox when all of a sudden he begins walking directly away from the mailbox at a constant speed of 4 feet per second.
: 
a. How far is Jose from the mailbox 5 seconds after he started walking?
(5*4) + 10 = 30' 
:
b. Write a formula that expresses Jose's distance from the mailbox (in feet), 
d = (t*s) + 10; where
d = distance
t = travel time
s = speed
d, in terms of the number of seconds t since he started walking. 
d = 4t + 10
:
c.As Jose walks away from the mailbox, is his distance from the mailbox proportional to the time elapsed since he started walking away from the mailbox?
Yes, directly proportional