Graphing Equations and Calculators

To demonstrate how to graph equations by plotting points

To discuss advanced calculus concepts

To teach how to solve equations algebraically

To explain the history of graphing

Two x coordinates

A single coordinate

Two y coordinates

An x coordinate and a y coordinate

1

0

3

-3

(-2, -3)

(2, 2)

(0, 0)

(1, 1)

y = 3/5x + 2

y = -3/5x + 2

y = -5/3x + 2

y = 5/3x + 2

Because it makes the graph more accurate

Because 5 is a prime number

Because it simplifies the equation

Because the coefficient of x is in fraction form

0

1

2

3

Use a decimal instead

Ignore the fraction

Put the fraction in parentheses

Multiply the fraction by 10

Recalculate manually

Use a ruler

Check the graph visually

Ask a friend

It predicts future points

It solves equations automatically

It eliminates the need for a coordinate plane

It provides a visual representation