Question

Which is the formula for slope of a line.

Answer 1

If the line passes through the points $A(x_1,y_1)$ and $B(x_2,y_2),$ then the slope of the line can be determined as

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

Then the equation of the line is

$y=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)+y_1.$

Answer: correct choice is B

Answer 2

Answer:

The correct answer option is $m=\frac{y_2-y_1}{x_2-x_1}$.

Step-by-step explanation:

To the find of the slope of a line, we need at least two points that are on the line: $(x1,y_1)$ and $(y_1,y_2)$.

With the help of the coordinates of these two points, we can find the slope of the line by taking the ratio of the difference in values of y by the difference in values of x.

The slope of a line is denoted by $m$:

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