Z varies directly with x and inversely with y.
1 answer:
Answer:
z =
Step-by-step explanation:
Given that z varies directly with x and inversely with y then the equation relating them is
z = ← k is the constant of variation
To find k use the condition when x = 6 and y = 2, z = 15, thus
15 = ( multiply both sides by 2 )
30 = 6k ( divide both sides by 6 )
5 = k
z = ← equation of variation
When x = 4 and y = 9, then
z = =
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In a set of data, if the data is perfectly symmetrical then the mean is equal to the median. In this case, the median would be 50.
For example, consider the data set: {25, 50, 75}
The mean is going to be 50 because = 50
The median is also 50 because that is the middle number when ordered numerically.
Hope this helped! Let me know if you have any more questions.