1. Chapter 1: Lesson 1.10 Mathematical Modeling & Relations
HW #18(b): Find the equation of the regression line using a calculator.

2. Direct Variation
#21) If y is directly proportional to x and x = 10 when y = 2050, find a linear model that relates x and y.
Inverse Variation
See Homework #33

3. Joint Variation
If z varies jointly as x and y then
z = kxy (where k is a constant)
#46 What would be a mathematical model for
“z varies jointly as the square of x and the cube of y?
#60 What would be a mathematical model for
“P varies directly as x and inversely as the square of y?
What is the constant if P = 28/3 when x = 42 and y = 9?