Question

Help please:
http://prntscr.com/aailz7

Answer 1

remember, the y-intercept value, when the curve crosses the y axis occurs when x=0

Answer 2

(x,y)=(0,y)

Answer 3

a(x)- let x=0 and see the y intercept value
b(x) - read the value from chart where x=0
c(x) - look where crosses y axis