MATH 9 2nd Quarter

The speed r of a moving object is inversely proportional to the time t traveled is written as ___________.

• r = kt

• r = k/t 

• t = kr

• r/k = r

Which of the following is an example of a direct variation?

• xy = 10

• y = 2/x

• t = kr

• r/k = r

The cost c varies directly as the number n of pencils is written as ____.

• n = kc

• c = kn

• k = kn

• c = k/n

What letter or variable is used to represent the constant of variation?

(a)  

Tags

CCSS.HSF-LE.A.1B

Which expression is read as “y varies jointly as x and z”?

(a)  

What happens to T when h is doubled in the equation T = 4h?

• T is halved

• T is doubled

• T is tripled

• T becomes zero

Tags

CCSS.HSF-LE.A.1B

In the equation y = 7x, which is the constant of variation?

(a)  

Tags

CCSS.HSF-LE.A.1B

Ejay, Joshua, Ralph and Chris can do a portion of a job in 8 days. If the job is to be completed within 6 days, how many workers are needed?

• 1

• 2

• 3

• 4

Tags

CCSS.HSA.CED.A.1

At 60 kilometers per hour, it takes Kevin 10 hours to travel from his house in the province to Manila. How long will it take him if he travels 80 kilometers per hour?

• 6

• 6.5

• 7

• 7.5

Tags

CCSS.6.RP.A.3B

Any number that is raised to the power of zero is equal to ______.

• 0

• 1

• 2

• 3

Tags

CCSS.8.EE.A.1