Sketching graphs, dom and ran, quartics

Hello,

I needed some help in solving the following:

Sketch the graphs with the following equations, showing any axial intercepts. State the maximal domain and range

Q1. http://www.texify.com/img/%5CLARGE%5...t3%7B-1%7D.gif

(Sorry for not knowing how to use texify)

Q2. y= 1

--------- -4

(x+1)^2

Q3. Write down an equation, in factor form, for the graph show below:

(can't draw it, but it's a quartic function which touches the x-axis at -2 and 1. The y-intercept is 20, however this is not the middle of the graph, the graph appears to have been shifted 1 unit to the left, i hope it isn't too hard to picture what im trying to say.

I honestly have no clue on how to do the first two, the third i attempted

because i no the equation is supposed to be something like: y=(x+2)(x-1)

but i'm not sure on how to obtain y-intercepts. please provide a detailed explanation so i can understand this, thank you math forum