<p>This worksheet is best used with an intermediate levelled group.</p> <p>Students may choose from two different sets of variables, then may proceed through three progressive sections of 6 questions.</p> <p>Students can do all 18 questions or choose a section.</p> <p>All 36 answers (18 for both sets of variables) are on the second page.</p> <p>PS - Should have uploaded this years ago.</p>