Slope of a line

Question

Let l1 be the line containing points (-1,9) and(8,-3) and let l2 be the line containing points (4,10) and (-32,58). Find the slope of each line. If slope not defined, enter undefined.

slope of l1

slope of l2

Answer 1

Step 1:

(a)

The line passing through points are .

Find the slope .

Substitute in the slope formula.

Slope of

(b)

The line passing through points are .

Substitute in the slope formula.

Slope of

Solution:

Slope of