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Maths Case study (4 Marks)

Introduction to Graphs · Jharkhand Board (JAC) STD 8 (Jharkhand - English Medium). 8 questions.

Questions

Case study (4 Marks)

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8 questions · self-marked practice — reveal the answer and mark yourself.

Question 14 Marks
Fill in the blanks to make the given statement true.
A point in which the $x-$coordinate is $0$ and $y-$coordinate is $5$ will lie on _________.
Answer
A point in which the $x-$coordinate is $0$ and $y-$coordinate is $5$ will lie on $y-$axis.
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Question 24 Marks
Fill in the blanks to make the given statement true. The $x-$coordinate of any point lying on the $y-$axis is always _________.
Answer
The x-coordinate of any point lying on the y-axis is always $0.$
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Question 34 Marks
Fill in the blanks to make the given statement true. The coordinates of the origin are ______.
Answer
The coordinates of the origin are $(0, 0).$
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Question 44 Marks
Fill in the blanks to make the given statement true.
The distance of any point from the $y-$axis is the _______ coordinate.
Answer
The distance of any point from the $y-$axis is the $x$ coordinate.
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Question 54 Marks
Fill in the blanks to make the given statement true. The point where the two axes intersect is called the ________.
Answer
The point where the two axes intersect is called the origin.
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Question 64 Marks
Fill in the blanks to make the given statement true. For the point $(5, 2),$ the distance from the x-axis is ______ units.
Answer
For the point $(5, 2)$, the distance from the x-axis is $2$ units.
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Question 74 Marks
Fill in the blanks to make the given statement true. All point with $y-$coordinate as $0$ lie on ________.
Answer
All point with $y-$coordinate as $0$ lie on $x-$axis.
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Question 84 Marks
The following chart gives the growth in height in terms of percentage of full height of boys and girls with their respective ages.
Age $($in years$)$ $8$ $9$ $10$ $11$ $12$ $13$ $14$ $15$ $16$ $17$ $18$
Boys $72\%$ $75\%$ $78\%$ $81\%$ $84\%$ $88\%$ $92\%$ $95\%$ $98\%$ $99\%$ $100\%$
Girls $77\%$ $81\%$ $84\%$ $88\%$ $91\%$ $95\%$ $98\%$ $99\%$ $99.5\%$ $100\%$ $100\%$
Draw the line graph of above data on the same sheet and answer the following questions.
$a.$ In which year both the boys and the girls achieve their maximum height?
$b.$ Who grows faster at puberty $(14$ years to $16$ years of age$)?$
Answer

$a.$ In $18 yr,$ the boys and in $17 yr,$ the girls achieve their maximum height.
$b.$ Boys grows faster the girls during puberty.
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