Question

tloh Help Mental Math Using the slope formula, find the slope of the line through the points (0,0) and (4,16). Use pencil and paper. Explain how you can use mental math to find the slope of the line. The slope of the line is .

Answer 1

Use the slope formula to find the slope of the line:

$m=\frac{y2-y1}{x2-x1}$

Replace for the given values

$m=\frac{16-0}{4-0}=\frac{16}{4}=4$

The slope of the line is 4.

You can use mental math to find the slope because as one of the points is (0,0), the formula is simplified to a simple division.