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Solving Linear and

Quadratic

Equations Mathematics Help Sheet

The University of Sydney Business School

1

Introduction to Functions

Linear Functions

A linear function possesses the general form,

ݕL=TE>

Where ݔ and ݕ are variables and ܽ and ܾ straight line when graphed on a Cartesian plane:

Dependent and Independent Variables

Consider the linear function,

ݕL=TE>

The variable on the left hand side, ݕ, is called the dependent variable as its value depends on the value of the independent variable. The variable on the right hand side, ݔ, is called the independent variable. For example, given the two variables ´QXPNHU RI GM\V RI UMLQ SHU PRQPOµ and ´QXPNHU RI XPEUHOODVDOHVquotesdbs_dbs19.pdfusesText_25