Question

https://gyazo.com/fd2c272edb8a61e386af2b0e0058a5f4

Answer 1

You can graph using the intercepts.
Your points are incorrect.
Let x = 0, and find y.

Answer 2

how?

Answer 3

f(x) means the same as y.
You have the equation given which I wrote below:

Answer 4

Now replace x with 0, and solve for y.