Direct Proportion Equations

Direct Proportion Equations

12th Grade

20 Qs

quiz-placeholder

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Direct Proportion Equations

Direct Proportion Equations

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

Anthony Clark

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

y is directly proportional to the square of x. When y = 24, x = 2. Find the value of y when x = 4.

6

96

24

2

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

H varies directly to the cube of c. When H = 40, c = 2. Find H when c = 5.

5

25

625

3

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

H varies directly to the cube of c. When H = 40, c = 2. Find c when H = 5000.

5

1000

10

2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A pebble is thrown vertically upwards. It has an initial speed of 𝑢 metres per second. The pebble reaches a maximum height of ℎ metres, before falling vertically downwards. It is known that ℎ is directly proportional to 𝑢 2 . When the pebble is thrown with an initial speed of 10m/s it reaches a maximum height of 5m. Find the initial speed of the pebble if the maximum height reached is 16m.

10

0.05

320

17.89

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

C is directly proportional to the square root of y. When C = 12.8, y = 16. Calculate C when y = 400.

3.2

20

64

4

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

y is directly proportional to x. When y = 270, x = 60. Which of these shows the correct method to calculate the constant of proportionality (k)?

k = 270 x 60

k = 270 - 60

k = 60 / 270

k = 270 / 60

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

y is directly proportional to x. When y = 145, x = 15. What is the correct method for calculating the constant of proportionality (k)?

k = 145 x 15

k = 145 - 15

k = 145 / 15

k = 15 / 145

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