Direct and Inverse Proportion

z is directly proportional to the square root of m.

•  $z=k\sqrt{m}$  
  ​

•  $z=\sqrt{m}$  
  ​

•  $z=km^2$  
  

•  $z=m^2$  
  

p is directly proportional to the cube of c.

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

If the cost of 5 pcs. apples is P125.00, how many apples if the total cost is P3,375.00?

• 115

• 120

• 135

• 150

Tags

CCSS.6.RP.A.3B

An electric pole, 7 meters high, casts a shadow of 5 meters. Find the height of a tree that casts a shadow of 10 meters under similar conditions.

Tags

CCSS.7.RP.A.3

A train travels 200 km in 5 hours. How much time it will take to cover 600 km?

• 15 hours

• 10 hours

• 5 hours

• 20 hours

Tags

CCSS.6.RP.A.3B

y is directly proportional to x, and when x=3 then y=15. What is the constant of proportionality or the value of k?

• 15

• 45

• 5

• 3

Tags

CCSS.7.RP.A.2B

y is directly proportional to x, and when x=3 then y=15. What is the value of y when x=9?

• 45

• 30

• 50

• 35

The cost of 8 kgs of beans is P165.00, how much is the cost of 21.5 kgs of beans?

• P434.4375

• P443.4375

• P344.4375

• P4434.375

Tags

CCSS.7.EE.B.3

A car uses petrol at the rate of 1 gallon for every 30 miles travelled,

how many gallons will it take to travel 177 miles?

Tags

CCSS.6.RP.A.3B

y is directly proportional to the square of x. If y=200 when x=5, therefore the constant of proportionality (k) is equal to 7.

• TRUE

• FALSE