Which phrase best describes a scatter plot in which the variables are correlated with r = 0.79?
2 answers:
Answer: D.) strong positive association
Step-by-step explanation:
The given correlation coefficient
Since its polarity is positive then it must represent a positive association.
We know that if the r value is closer to +1 or -1 then it tells that there is a stronger linear relationship between the two variables.
Also it lies between 0.5 to 1 i.e. 0.5 < 0.79 < 1, therefore it must represent a strong positive association between the two variables.
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The number of units of x that must be sold to break even is 12 units.
Explanation:
It is given that the cost function C(x) is given by
Also, the revenue function R(x) is given by
The break even point can be determined by equating the cost function and the revenue function.
Thus, we have,
Subtracting both sides by , we get,
Dividing both sides by , we have,
Thus, it takes 12 units to be sold to break even.
Hence, the number of units of x that must be sold to break even is 12 units.