sec 3.7
Formulas and functions
A formula is an algebraic equation that relates two or more real life quantities.
Function Form ­ A two variable equation is written in function form if one of its variables is isolated on one side of the equation
Output variable
­ The isolated variable is the output variable
Note: " the output variable is a function of the input variable"
Why are there stars there?
Title: Nov 1­7:23 AM (1 of 4)
Because it will
be on a
test silly
Ex 1) For the equation P = 4s. This formula describes the perimeter of a square "P" as a function of its side length "s"
What is the input variable?
"s" is the input
What is the output variable?
"P" is the output
Rewriting an equation in function form.
Ex 2) Rewrite the equation 3x + y = 4 so that y is a function of x.
Ex 3) Rewrite the equation 3x + y = 4 so that x is a function of y.
Assignment page 177, numbers 8, 15 ­ 29 odd
Title: Oct 14­2:27 PM (2 of 4)
Title: Oct 18­8:37 AM (3 of 4)
Title: Oct 8­9:26 AM (4 of 4)
Attachments
ghost8.wav