Chapter 2: Introduction to Linear Polynomials

Exercise

Question

Question: 4 (iii)

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A telecom company charges ₹600 for a certain recharge scheme. This prepaid balance is reduced by ₹15 each day after the recharge.

(iii) Make a table of values for x varying from 1 to 10 days and show how the balance b(x), reduces with time.

Answer

1
Recall the expression derived in the previous question for the balance b(x) and time x.
$b(x) = 600 - 15x$
2
Find the balance for each value of x from 1 to 10 days using the linear expression.
${color:green}Answer: The table shows how the balance decreases by ₹15 every day.{/color}$
$x$ (days)
$b(x)$ (₹)
1
600 - 15 × 1 = 585
2
600 - 15 × 2 = 570
3
600 - 15 × 3 = 555
4
600 - 15 × 4 = 540
5
600 - 15 × 5 = 525
6
600 - 15 × 6 = 510
7
600 - 15 × 7 = 495
8
600 - 15 × 8 = 480
9
600 - 15 × 9 = 465
10
600 - 15 × 10 = 450
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