CBSE · Class 6-12

Back to Two Variables, One Line

Class 9 · Ganita Manjari · Unit 13: Two Variables, One Line

Slope — the Heartbeat of a Line

Lesson 2 of 3

Slope

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

tells you how fast

y

changes with

x

. Positive

m

climbs left-to-right; negative

m

falls;

m = 0

is flat.

Why Infinitely Many Solutions

Two Lines, Three Fates

All lessons in this unit