72.4k views
0 votes
What is the slope of a line that passes through the points (1, 2) and (-2, 4)?

A. - 3/2
B. -2
C. -2/3
D. 2

User Parthiban
by
7.6k points

1 Answer

5 votes
The slope can be worked out by the equation:

((y2 - y1) )/((x2-x1))
So with the coordinates (1,2) and (-2,4):
x1 = 1 y1= 2 and x2 = -2 y2 =4
Note that x1 and y1 use the same coordinate, vice versa with x2 and y2.
Tip: The equation can be y1-y2 and x1-y2 too (have a think why)

((y2 - y1) )/((x2-x1))

((4 - 2) )/((-2-1))

((2) )/((-3))
So the answer is 2/-3, which is the same as C) -2/3

User Erhan Bagdemir
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories