If the population of a town grew 15% up to 76,894, what was the population last year?
2 answers:
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Solution :
It is given that Little Snail is going to visit one of his friend at the pond which is 3 miles away.
When the snail crawls 1/2 of a mile per day, it will take him,
= 6 days to get to the next pond.
When the snail crawls 1/3 of a mile per day, it will take him,
= 9 days to get to the next pond.
When the snail crawls 1/4 of a mile per day, it will take him,
= 12 days to get to the next pond.
When the snail crawls 3/4 of a mile per day, it will take him,
= 4 days to get to the next pond.
When the snail crawls 2/3 of a mile per day, it will take him,
= 4.5 days to get to the next pond.
ANSWER
The rule is given by the relation,
EXPLANATION
We need to check and see if there is a constant difference between the y-values.
We can see that, there is a constant difference of 2.
This means that the table represents a linear relationship.
Let the rule be of the form,
Then the points in the table should satisfy the above rule.
So let us plug in
This implies that,
Our rule now becomes,
We again plug in another point say, (-1,-1) in to equation (1) to get,
we solve for m now to obtain,
We now substitute back in to equation (1) to get
The rule is given by the relation,
EXPLANATION
We need to check and see if there is a constant difference between the y-values.
We can see that, there is a constant difference of 2.
This means that the table represents a linear relationship.
Let the rule be of the form,
Then the points in the table should satisfy the above rule.
So let us plug in
This implies that,
Our rule now becomes,
We again plug in another point say, (-1,-1) in to equation (1) to get,
we solve for m now to obtain,
We now substitute back in to equation (1) to get