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by VRINDA SOBTI

# Cover

The Straight Line Graph
VRINDA SOBTI
IBDP Year 1
CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .

Gradient of a Graph. . . . . . . . . . . . . . . . . . . .

Equation to find Gradient . . . . . . . . . . . . . . .

Basic equation of a straight line. . . . . . . . . .

Point gradient form. . . . . . . . . . . . . . . . . . . . .

General form . . . . . . . . . . . . . . . . . . . . . . . . . .

The mid-point of a line. . . . . . . . . . . . . . . . . . .

Some questions to solve. . . . . . . . . . . . . . . . . .

Answers!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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22
INTRODUCTION
What are linear graphs?
Linear graphs can be represented as straight lines. The word linear itself means straight line! A linear graph is a straight line graph that is plotted on a Cartesian plane with x and y axis.

Equation of a straight line graph is
y = mx + c
Linear vs Non-Linear Graphs
Fig 1
Fig 1.1
Linear Graph
Non-Linear Graph
Basics
Key features of straight line graphs.
Fig 2