Question

7. Find the slope of a line which passes through the origin and point (2,4).A 0.5B -0.5C 2D 4

Answer 1

C

Explanation:

the slope of a line is the ratio (y coordinate change / x coordinate change) when going from one point on the line to another.

in our case here we are going e.g. from the origin (0, 0) to (2, 4).

so, x changes by +2 (from 0 to 2).

y changes by +4 (from 0 to 4).

therefore, the slope is

+4/+2 = 2

FYI - the direction is not important. it works the same way in the other direction. but what is important : once you pick a direction for one coordinate, you have to use the same direction for the second one. you cannot go e.g. for x in one direction and for y in the other.