Direct Variation Form

Write the statement in the form of equation. Use k as the constant of variation. (choose 1 equation only, use small letter and no spacing)

c is directly proportional to d

Write the statement in the form of equation. Use k as the constant of variation. (choose 1 equation only, use small letter and no spacing)

w varies directly as z

Solve for the unknown variable:

If y varies directly as x and y = 96 when x = 4, what is the value of y when x = 30?

Solve for the unknown variable:

If a varies directly as b and a = 12 when b = 20, what is the value of b if a = 123? (no space)

Solve for the unknown variable:

If z varies directly as r and z = 243 when r = 27. What is the value of z when r = 780? (do not use comma)

The distance covered by a moving object with a constant rate varies directly as the time it travelled. Milo walked 40 meters in 15 seconds. How long will it take him to walk 128 meters with a constant rate? (use small letter for the unit of measure, __ seconds)

A school committee is assigned the task of selecting a DJ for their annual dance night. They were able to find a DJ who charges 5000 pesos for every 3 hours. How much will the school pay if the dance lasts for 9 hours? (use the word pesos in small letter as unit of measure, __ pesos)

In a direct variation, y = 39 when x = 3. 
Find the value of y when x = 2.

• 26
• 3
• 58.5
• 2

The amount of money earned on a job is directly proportional to the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265

The interest received on a savings account varies directly with the amount deposited. Daniel received $55.35 in interest on $1230 he deposited. How much interest would Daniel have received if he had deposited $2000 into his account?

• 34.04
• 90.00
• 1,285.35
• 44,444.44