Chapter 17 Graphing Equations

Open Ended

What are some uses for graphs?

Poll

Graphing Equations is something you have done:

• Often

• Never

• A few times

• I don't know

Graphing

When we want to place a point on a graph, we always use the same rule.

We start with the x-axis (the horizontal line) and then we use the y-axis (the vertical line).

The second number is found on the y- axis.

The two numbers are connected at one point.

The first number is found on the x- axis.

(x,y)

Graphing

Let's graph:

(5,4)

(2,3)

(-2, 3)

Graphing Equations

If x is equal to 1, then y =

If x is equal to 2, then y =

If x is equal to 3, then y =

​

2x + 1 = y

Graphing

Graph the equation

2x+1= y

Use the chart up above for your coordinate points.

Graphing

How would you graph, x= -8?

Graphing

Graph 3x-5=y

Useful Ways to Use Graphs

Anna earned $5 per hour at her babysitting job. We could create a graph to see how much money she will make each hour.

Business Example

If someone travled 100 miles in 2 hours, we could figure out how far he would go in 10 hours by looking at the graph.

Trips

Trips, Businesses, Test, Etc

Match

Match the following slopes

This line has a steep slope.

This line is flat and has 0 slope.

This line has a med. slope and is negati

This line is so steep, it is infinitely.

• This line has a steep slope.

• This line is flat and has 0 slope.

• This line has a med. slope and is negati

• This line is so steep, it is infinitely.