Direct and Inverse Variation
A function in the form
y = kx, where k does not equal zero, is a direct variation. The variables x and y are said to vary directly with each other. The constant of variation, k, is the coefficient of x.
An equation in the form xy = k or y = k/x, where k does not equal zero, is an inverse variation. The constant of variation is k, the product of x times y for an ordered pair (x, y).
Watch the video and determine whether each function is a direct or inverse variation:
y = kx, where k does not equal zero, is a direct variation. The variables x and y are said to vary directly with each other. The constant of variation, k, is the coefficient of x.
An equation in the form xy = k or y = k/x, where k does not equal zero, is an inverse variation. The constant of variation is k, the product of x times y for an ordered pair (x, y).
Watch the video and determine whether each function is a direct or inverse variation:
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PRACTICE
On this website http://coburgmathsgeneral12.edublogs.org/2008/04/29/thurday-and-friday-week-12/ determine whether each of the tables is a direct or inverse variation.
ASSESS
Check for understanding with this quiz: http://www.thatquiz.org/tq/practicetest?5xjblmy190l.
PRACTICE
On this website http://coburgmathsgeneral12.edublogs.org/2008/04/29/thurday-and-friday-week-12/ determine whether each of the tables is a direct or inverse variation.
ASSESS
Check for understanding with this quiz: http://www.thatquiz.org/tq/practicetest?5xjblmy190l.