Chapter 8, Problem 14CR

To determine

To find:

The slope of the line that passes through the given points.

Answer to Problem 14CR

The slope of the line passing through the given points would be $-4$ .

Explanation of Solution

Given:

Two points on a line:

  $(3,4)\text{and (}7,-12)$ .

Concept used:

  $\begin{array}{l}m=\frac{y_2-y_1}{x_2-x_1},\text{where,}\\ m=\text{Slope of line,}\\ y_2-y_1=\text{Difference between two }y\text{-coordinates}\\ x_2-x_1=\text{Difference between two }x\text{-coordinates of same }y-\text{coordinates}\end{array}$

Calculation:

Let point $(3,4)=(x_1,y_1)\text{and (}7,-12)=(x_2,y_2)$ . Upon substituting our given coordinates in slope formula, we will get:

  $\begin{array}{l}m=\frac{y_2-y_1}{x_2-x_1}\\ m=\frac{-12-4}{7-3}\\ m=\frac{-16}{4}\\ m=-4\end{array}$

Therefore, the slope of the line passing through the given points would be $-4$ .