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Question (31)

QN009069

The cost function of a journey is C(d)=100+60d. What is the cost for travelling 5 km?

(A) ₹300
(B) ₹350
(C) ₹400
(D) ₹450

Correct Answer: C

Explanation:

100+60(5)=400

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Question (32)

QN009070

In the function C(d)=100+60d, the cost increases by ₹60 for every:

(A) metre
(B) kilometre
(C) 5 kilometres
(D) 10 kilometres

Correct Answer: B

Explanation:

Coefficient of d represents increase per kilometre.

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Question (33)

QN009071

Water height in a tank is given by h(t)=3−0.5t. What is the height after 4 months?

(A) 0.5 m
(B) 1 m
(C) 1.5 m
(D) 2 m

Correct Answer: B

Explanation:

3−0.5(4)=1

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Question (34)

QN009072

The function h(t)=3−0.5t represents:

(A) linear growth
(B) quadratic decay
(C) linear decay
(D) exponential growth

Correct Answer: C

Explanation:

Value decreases at a constant rate.

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Question (35)

QN009073

A plant has initial height 1.75 feet and grows by 0.5 feet monthly. Which expression gives the height after t months?

(A) 1.75−0.5t
(B) 0.5+1.75t
(C) 1.75+0.5t
(D) 2.25t

Correct Answer: C

Explanation:

Initial height + monthly growth.

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Question (36)

QN009074

A mobile phone costs ₹10,000 and loses ₹800 every year. What will be its value after 5 years?

(A) ₹5000
(B) ₹6000
(C) ₹7000
(D) ₹8000

Correct Answer: B

Explanation:

10000−800×5=6000

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Question (37)

QN009075

A village population is 750 and increases by 50 yearly. What will be the population after 8 years?

(A) 1050
(B) 1100
(C) 1150
(D) 1200

Correct Answer: C

Explanation:

750+50×8=1150

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Question (38)

QN009076

A telecom recharge balance decreases by ₹15 daily from ₹600. Which expression represents the balance after x days?

(A) 600+15x
(B) 600−15x
(C) 15x−600
(D) 615x

Correct Answer: B

Explanation:

Balance decreases by ₹15 daily.

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Question (39)

QN009077

If y=ax+b, then a represents the:

(A) y-intercept
(B) variable
(C) slope
(D) constant term

Correct Answer: C

Explanation:

Coefficient of x gives the slope.

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Question (40)

QN009078

If y=ax+b, then b represents the:

(A) slope
(B) y-intercept
(C) x-coordinate
(D) coefficient of y

Correct Answer: B

Explanation:

Constant term is the y-intercept.

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Question (31)

The cost function of a journey is C(d)=100+60d. What is the cost for travelling 5 km?

Explanation:

Link:

Question (32)

In the function C(d)=100+60d, the cost increases by ₹60 for every:

Explanation:

Link:

Question (33)

Water height in a tank is given by h(t)=3−0.5t. What is the height after 4 months?

Explanation:

Link:

Question (34)

The function h(t)=3−0.5t represents:

Explanation:

Link:

Question (35)

A plant has initial height 1.75 feet and grows by 0.5 feet monthly. Which expression gives the height after t months?

Explanation:

Link:

Question (36)

A mobile phone costs ₹10,000 and loses ₹800 every year. What will be its value after 5 years?

Explanation:

Link:

Question (37)

A village population is 750 and increases by 50 yearly. What will be the population after 8 years?

Explanation:

Link:

Question (38)

A telecom recharge balance decreases by ₹15 daily from ₹600. Which expression represents the balance after x days?

Explanation:

Link:

Question (39)

If y=ax+b, then a represents the:

Explanation:

Link:

Question (40)

If y=ax+b, then b represents the:

Explanation:

Link:

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