Linear Functions and Graphs
Key Questions

This is a linear equation. A linear equation is the representation of straight line.
This particular equation is called slope intercept form.
The
#m# in the formula is the slope.The
#b# in the formula is where the line intersects the#y# axis is this called the#y# intercept. 
A linear function models a straight line that has a constant slope or rate of change.
There are various forms of linear equations.
Standard Form
#Ax+By=C# where
#A, B and C# are real numbers.Slope Intercept Form
#y=mx+b# where
#m# is the slope and#b# is the#y# interceptPoint Slope Form
#(yy_1)=m(xx_1)# where
#(x_1,y_1)# is any point on the line and#m# is the slope.