Functions and equations
We have that:
Let's name each side of it with f(x) and g(x):
Then, we have that:
Then, the answer is C
<h2>Answer: C</h2>
A. Write an equation that can be used to determine the number of text messages Jacob and Roberto can send for their plan to cost
the same
B. Solve the equation form part A to find the number of text messages each person can send for their costs to be the same
B. Solve the equation form part A to find the number of text messages each person can send for their costs to be the same
1 answer:
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We can write any number n in the form , since
and
are inverse functions, so that
The bases are the same on both sides, so the exponents must be equal.
Solve for x :
Answer: a. The correlation coefficient of the data is positive.
Step-by-step explanation:
Estimated slope of sample regression line =
Here , confidence interval : (-0.181, 1.529)
Estimated slope of sample regression line =
⇒Correlation coefficient(r) must be positive, So a. is true.
But, d. and e. are wrong(0.674 ≠ 0 or 1.348).
We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.
We cannot say that scatterplot is linear as we cannot determine it from interval, so c. is wrong
So, the correct option : a. The correlation coefficient of the data is positive.