Activity 6: Direct Vs. Inverse Variation

If the phrase is a direct variation, write D, if it is an inverse variation, I. If the relationship is neither a direct nor inverse variation, write N.

The number of hours to finish a job to the number of men working.

If the phrase is a direct variation, write D, if it is an inverse variation, I. If the relationship is neither a direct nor inverse variation, write N.

The number of persons sharing a pie to the size of the slices of the pie.

If the phrase is a direct variation, write D, if it is an inverse variation, I. If the relationship is neither a direct nor inverse variation, write N.

The time a teacher spends checking papers to the number of students.

If the phrase is a direct variation, write D, if it is an inverse variation, I. If the relationship is neither a direct nor inverse variation, write N.

The age of a used car to its resale value.

If the phrase is a direct variation, write D, if it is an inverse variation, I. If the relationship is neither a direct nor inverse variation, write N.

The amount of money raised in a concert to the number of tickets sold.

If w varies inversely as y and w = 2 when y = 3, find w when y = 6.

If a varies inversely as b and a = 12 when b = 8, find a when b = 6.

The number of days needed in repairing a house varies inversely as the number of men working. It takes 15 days for 2 men to repair the house. How many men are needed to complete the job in 6 days?