Question

Please!! What is the slope of each line? Are they the same or different?

Answer 1

Given:

The graph of two lines.

To find:

The slope of each line and check whether they are same or different.

Solution:

If a line passes through two points, then the slope of a line is:

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

From the graph 1, it is clear that the line passes through the points (2,175) and (3,165). So, the slope of first line is:

$m_1=\dfrac{175-165}{3-2}$

$m_1=\dfrac{10}{1}$

$m_1=10$

The slope of first line is 10.

From the graph 2, it is clear that the line passes through the points (1,175) and (2,165). So, the slope of first line is:

$m_2=\dfrac{175-165}{2-1}$

$m_2=\dfrac{10}{1}$

$m_2=10$

The slope of second line is 10.

$m_1=m_2$

Therefore, the slopes of both lines are same, i.e. 10.