# Math Help - Function help

1. ## Function help

On a particular problem,

5. Given the function: y= (x + 1)^2 - 8

i) Identify each function is a linear, quadratic, sqrt, or reciprocal function. I got quadratic.

ii) State the domain and range. D = { x E R } R = { y E R | y ≥ -8}

iii) Determine f(3). Solved and got f(3) = 8

However on the last part.. I think it might be to vague or I may be dumb.. it states.

iv) Express the function in two other ways..

Umm, does that mean in graph form, ordered pairs, table of values? Im not quite sure I follow any help would be appreciated. Thanks in advance.

2. Originally Posted by danzig
I think it might be to vague or I may be dumb.. it states.

iv) Express the function in two other ways..

Umm, does that mean in graph form, ordered pairs, table of values? Im not quite sure I follow any help would be appreciated. Thanks in advance.
It is incredibly vague. The function initially appears to be in "vertex form", so try expressing it in the form $y=ax^2+bx+c$. Then check to see whether it factorizes. I wish I could assist you, but that is poorly worded. If it doesn't, perhaps you could sketch the function; that is, a plan of the graph's general shape, including labels of the function's intercepts with the co-ordinate axes, and its minimum value.