Answer:
1/7
Step-by-step explanation:
1 - 0 1
------ = -------
0 - ( - 7) 7

Integrating both sides, we get


When

, we have

, so that

When

, we have

, which means
The constant of proportionality is k = y/x.....k = 40/200 = 1/5
y = mx + b
slope(m) = 1/5
(200,40)...x = 200 and y = 40
now we sub...we r looking for b, the y int
40 = 1/5(200) + b
40 = 40 + b
40 - 40 = b
0 = b
so ur equation is : y = 1/5x
if pop star earned 800
800 = 1/5x
800 * 5 = x
4000 = x
18000 dividenby 60 seconds equals 300 minutes....300 minutes divided by 60 min is 5 houre