Yooo can somebody pls help I’ve been stuck on this for hrs, I’ll give you 10 or 20 points!

Answer:
Step-by-step explanation:
I have no idea how to do the diagrams.
X-intercepts are the ROOTS!
(x+7)(x+3)
x = -7,-3
Y-intercept is just when x ='s 0 lol
y inter = 21