9514 1404 393
Answer:
- Proportional, y = 3 times x
- Not proportional
Step-by-step explanation:
The graph shows a proportional relationship if it is a straight line that goes through the origin (0, 0). The constant of proportionality can be found by looking for the y-value when x = 1.
1) The graph is a straight line that goes through the origin. The relationship is proportional. When x=1, y=3, so ...
y = 3 times x
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2) The graph does not go through the origin. The relationship is Not Proportional.
Answer: (1,4) (2,7) (3,10)
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Step-by-step explanation:
From the information given, the original price per pound was increased by $ 0.75
Let the original price be x, so the new price is x + 0.75
Sam bought 3 pounds of apples at new price and it cost him 5.88
so we form an equation:
3 (x + 0.75) = 5.88
3x + 2.25 = 5.88
3x = 5.88 - 2.25
3x = 3.63
x = 3.63 / 3
x = 1.21
Therefore the original price per pound is 1.21 dollars
Answer:
Step-by-step explanation:
-For a known standard deviation, the sample size for a desired margin of error is calculated using the formula:
Where:
is the standard deviation
is the desired margin of error.
We substitute our given values to calculate the sample size:
Hence, the smallest desired sample size is 23
