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The Straight Line Graph

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VRINDA SOBTI
IBDP Year 1

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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!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

03

06

10

12

14

16

18

20

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

GRADIENT OF A GRAPH!