Pre-Algebra: Chapter 12-2
Area of Circles
The area of a circle is `A=pir^2`, where `pi`=3.14 and r is the radius of the circle. Remember, the relationship between the radius and the diameter, `2r=d`. Remember too, that the circumference C of a circle is `C=2pir`.
Algebra: Chapter 12-3
Linear Functions
A function `f` defined by an equation of the form `y=mx+b`, where `m` and `b` are real numbers, is a LINEAR function and can be written `f(x)=mx+b`.
If that is too confusing, forget the `f(x)` and just substitute `y` instead. Solve for the `f(x)` given the values specified in the domain (the `x` values) .