If a line whose x- and y- intercepts are equal does not pass through the origin, then its slope must be

Question

A. 0
B. 1
C. -1
D. undefined
I'm thinking it's 0, I don't know though.

Answer 1

make a sketch of a line with equal intercepts,
e.g. (a,0) and (0,a)

slope = (a-0)/(0-a) = -1