# Math Help - Power Function

1. ## Power Function

This may be an odd question, but could anyone explain to me why the "general form" of a linear function:

y=mx+b

... has a "+b" term, ie a y intercept, and yet the "general form" of a power function as I under it:

y = ax^b

is lacking a "+something" term?

thx
B

2. Originally Posted by NYKarl
This may be an odd question, but could anyone explain to me why the "general form" of a linear function:

y=mx+b

... has a "+b" term, ie a y intercept, and yet the "general form" of a power function as I under it:

y = ax^b

is lacking a "+something" term?

$y = a_nx^n + a_{n - 1}x^{n - 1} + ... + a_2x^2 + a_1x + a_0$