First Summative Test in Mathematics (3rd Quarter)

Translate into mathematical statement:

An employee’s salary S varies directly as the number of days d he has worked.

• S = kd

• S=d

• d = kS

Which table of values shows direct variation?

• 
• 
• 
• 

The value of y varies directly with x.  Which equation represents the relationship between x and y if y = 14 when x = 6. 

• y = 20x

• y = 84x

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

• 2

• 3

• 26

• 58.5

A person’s weekly pay is directly proportional to the number of hours worked. Shawn’s pay is ₱8000.00 for 20 hours of work. What is the constant of variation?

• 100

• 200

• 400

• 160000

Which of the given graphs is a direct variation?

• 
• 
• 
• 

What is the constant of proportionality based on the table if y varies directly as x?

• 18

• 6

• 3

• 2

Which of the following equations shows direct variation?

• Direct Variation

• Inverse Variation

• Joint Variation

• Combined Variation

The cost (C) of labor varies jointly as the number of workers (W) and the number of days (D) they work. If 10 men working 8 days each are paid Php560,

Which of the following is the value of the variation constant?

• 3

• 5

• 7

• 9