Answer:
(0,320) and (4,0)
Explanation:
The question has missing details. So, I've added the complete question as an attachment.
From the question, we understand that:
Justine started when Michael was 320 yards from the top.
This coordinate can be represented as (0,320)
0 represents the time Justine started and 320 represents the number of yards left.
Every minute, Justine covers 80 yards.
This implies that:
At 1 minute, Justine will have: (320 - 80) yards left
At 2 minutes, Justine will have: (320 - 80 - 80) yards left
At 3 minutes, Justine will have: (320 - 80 - 80 - 80) yards left
At n minutes, Justine will have (320 - 80n) yards left
So, possible coordinates are:
![(x_1,y_1) = (0,320)](https://img.qammunity.org/2022/formulas/mathematics/high-school/879nfl153iq9pdssz7ygg1fajhvo5wn6y9.png)
![(x_2,y_2) = (1,320-80*1) = (1,240)](https://img.qammunity.org/2022/formulas/mathematics/high-school/osasuzri7le5692s4htpl4kw8zx0ohnedn.png)
![(x_3,y_3) = (2,320-80*2) = (2,160)](https://img.qammunity.org/2022/formulas/mathematics/high-school/r6713e8m4xcxa9pp0ibhagh34i3v9h8bgp.png)
![(x_3,y_3) = (3,320-80*3) = (3,80)](https://img.qammunity.org/2022/formulas/mathematics/high-school/8myseilkvvbpb0dmsr5qnubc1uffvgghpi.png)
![(x_4,y_4) = (4,320-80*4) = (4,0)](https://img.qammunity.org/2022/formulas/mathematics/high-school/ushhv58qgf0tb0ojvzubbsqqrbp9faonea.png)