I understand the basics of variations, but am having trouble when numbers are applied. For example, I have the following problem:
"Assume that y is directly proportional to x. Use the given x-value and y-value to find a linear model that relates y and x.
x = 9, y = 36 "
How do I find the linear model?
The same goes for this problem:
"Find a mathematical model representing the statement. (In each case, determine the constant of proportionality.) y is inversely proportional to x. (y = 7 when x = 32.)"
Any help is greatly appreciated. Thanks