Calculate the slope of the straight line through the points $( - 1,0 )$ and $\left( - \frac { 7 } { 8 } , \frac { 1 } { 4 } \right)$ . Try to do the calculation mentally.
A) $m = 2$
B) $m = 7$
C) $m = - \frac { 2 } { 15 }$
D) $m = - \frac { 1 } { 2 }$
E) $m = \frac { 1 } { 7 }$

Question

Calculate the slope of the straight line through the points $( - 1,0 )$ and $\left( - \frac { 7 } { 8 } , \frac { 1 } { 4 } \right)$ . Try to do the calculation mentally. 
A) $m = 2$
B) $m = 7$
C)  $m = - \frac { 2 } { 15 }$
D)  $m = - \frac { 1 } { 2 }$
E)  $m = \frac { 1 } { 7 }$

Quizplus · Accepted Answer

The slope $m$ of a line through points $(x_1, y_1)$ and $(x_2, y_2)$ is given by $m = \frac{y_2 - y_1}{x_2 - x_1}$. Substituting the given points, $m = \frac{\frac{1}{4} - 0}{-\frac{7}{8} + 1} = \frac{\frac{1}{4}}{\frac{1}{8}} = 2$.

Calculate the Slope of the Straight Line Through the Points (−1,0)( - 1,0 )(−1,0)

Calculate the Slope of the Straight Line Through the Points $( - 1,0 )$