4.2

Graph linear equations in a coordinate plane

Linear Equation

• An equation whose graph is a line.

Standard form of a linear equation

• ax+by=c

Solutions to linear equations

• Ordered pairs that result in true statements when substituted into a linear equation.

Graphing linear equations

• Create a domain of at least three values.

• Choose values that are convenient.

• Solve the equation for those values.

Graph a linear equation

• -2x + y = -3

y=b and x=a

Vertical Line Test

• A function is represented by a graph in which a vertical line will not pass through more than one point.

• Is y=b a function?

• Is x=a a function?

Graph the Equation:

• y = 3x - 2

Graph the Equation

• y = 2.5

Graph the Equation

• x = -4