I am having trouble deriving the supply and demand curves for my Econ homework. I am given a table that includes price, quantity demanded, quantity supplied. I know that the equation is the intercept-slope of line xQ

and for the slope its intercept + slope of line x Q but I am never able to come up with the right answer

price to consumers. quantity demanded. quantity supplied

8 100 80

9 90 90

10 80 100

11 70 110

12 60 120

13 50 130

I would just need help going about finding the supply and demand curves. thank you