0
(-3,0)
(5, 0) 10
(0, -15)
|(1,-16)
find the axis of symmetry

1--16

ಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಥ‿ಥಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ_ʖಠಠ︵ಠಠ︵ಠಠ︵ಠಠ︵ಠಠ︵ಠಠ︵ಠಠ︵ಠಠ︵ಠಠ,_｣ಠಠ,_｣ಠಠ﹏ಠಠ﹏ಠʕಠ_ಠʔʕಠ_ಠʔʕಠ_ಠʔʕಠ_ಠʔ(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)(⌐■-■)ಠ◡ಠ

2/3

Step-by-step explanation:

Gradient = rise/run

rise = 80 - 60 = 20

run = 70 - 40 = 30

Gradient = 20/30 = 2/3