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Concept explainers
a.
To solve: the rate of change in the water height so the number of marbles.
a.
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Answer to Problem 1MP
Rate of change is 0.3 cm in water level per marble addition
Explanation of Solution
Given Information
A table has been given, representing number of marbles & its corresponding height of rise in water level.
We have to find out the respective rate of change in the water height so the number of marbles, water level rises for each marble and also type of relation in terms of function between number of marbles and water height.
Calculation
We can clearly observe that, when there were 3 marbles, water level was at 6.9 cm.
On subsequent addition of 2 more marbles, water level rose by 0.6 cm and so on.
Conclusion
We notice that, it is a case of linear relation function and a discrete rise in level is observed on subsequent addition of marbles.
b.
To solve: the water level rise for each marble
b.
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Answer to Problem 1MP
0.3 cm.
Explanation of Solution
Given Information
A table has been given, representing number of marbles & its corresponding height of rise in water level.
We have to find out the respective rate of change in the water height so the number of marbles, water level rises for each marble and also type of relation in terms of function between number of marbles and water height.
Calculation From the table we clearly notice that,
(i)Addition of further 2 marbles, defined a change in height of 0.6 cm
(ii)Addition of further 4 marbles, a change of 1.2 cm is observed.
Similarly, for 5 marbles ( 1.5
for 3 marbles ( 0.9
for 6 marbles ( 1.8
So, in each case rise of water level per marble will be
Conclusion Therefore, for each subsequent marble, rise in water level is by 0.3 cm.
c.
To solve: the type of relation in terms of function between number of marbles and water height.
c.
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Answer to Problem 1MP
Linear relationship
Explanation of Solution
Given Information
A table has been given, representing number of marbles & its corresponding height of rise in water level.
We have to find out the respective rate of change in the water height so the number of marbles, water level rises for each marble and also type of relation in terms of function between number of marbles and water height.
Calculation
Establishing the relationship between number of marbles and water height
where,
y = 6 + 0. 3x
y = height of water (in cm)
x = number of marbles
So, for, x = 0; y = 6 cm which signifies that, initially with no marble, the height of water was 6 cm.
For, x = 3
y = 6 (0.3 × 3)
y = 6 + 0.9 = 6.9 cm
which matches the given table.
Conclusion
Hence, our relation, y = 6 + 0. 3x is verified, and it clearly shows a linear relationship.
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High School Math 2011 Algebra 1 Student Companion Grade 8/9
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