Answer all and me, Santa will give brainliest

9. B: y = 7.5x - 2

10. y = 2x  - 1/4

11. C: A newborn baby weighs 8 pounds at birth and gains 1.5 pounds for 3 months.

Step-by-step explanation:

If there is a minus symbol before the y-intercept then the slope is negative.

For 0 it has 8. A newborn baby is 0 months old.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

(Edit) Happy holidays!

answer: jasmine will bake 4/3 or 1 1/3 cookies in an hour

step-by-step explanation:

if u add 1/3 every 15 minutes after an hour u will have 4/3 or 1 1/3