Calculate the slope of the straight line through the points $( 2,1 )$ and $( 5,10 )$ . Try to do the calculations mentally.
A) $m = 9$
B) $m = - 3$
C) $m = \frac { 1 } { 3 }$
D) $m = - \frac { 1 } { 3 }$
E) $m = 3$

Question

Calculate the slope of the straight line through the points $( 2,1 )$ and $( 5,10 )$ . Try to do the calculations mentally. 
A) $m = 9$
B)  $m = - 3$
C)  $m = \frac { 1 } { 3 }$
D)  $m = - \frac { 1 } { 3 }$
E)  $m = 3$

Quizplus · Accepted Answer

The slope $m$ of a line through points $(x_1, y_1)$ and $(x_2, y_2)$ is given by $m = \frac{y_2 - y_1}{x_2 - x_1}$. For points $(2,1)$ and $(5,10)$, $m = \frac{10 - 1}{5 - 2} = \frac{9}{3} = 3$.

Calculate the Slope of the Straight Line Through the Points (2,1)( 2,1 )(2,1)

Calculate the Slope of the Straight Line Through the Points $( 2,1 )$