Question

What is the slope of line a?

Answer 1

Given:

The graph of a line a.

To find:

The slope of the line a.

Solution:

Slope formula:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

From the given graph it is clear that the line a passes through the points (-1,1) and (0,-2). So, the slope of the line a is:

$m=\dfrac{-2-1}{0-(-1)}$

$m=\dfrac{-3}{1}$

$m=-3$

The slope of the line a is -3. Therefore, the correct option is C.