Question

The set of points P(0, 3), Q(2, 0), R(4, -3) are collinear and the line has a slope of _____.

Answer 1

-3/2

Explanation:

I just did this lesson.

The line has a slope of -3/2

Answer 2

If the points P, Q and R are collinear, then a slope of line PQ and a slope of line QR are equal.

The formula of a slope:

`m=(y_2-y_1)/(x_2-x_1)`

PQ → (0, 3), (2, 0).

Substitute:

`m=(0-3)/(2-0)=(-3)/(2)=-1.5`

QR → (2, 0), (4, -3).

Substitute:

`m=(-3-0)/(4-2)=(-3)/(2)=-1.5`

CORRECT :)

Answer: m = -1.5.