Answer:
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
In this problem we have
The constant of proportionality K is the same that the slope of the linear equation
The value of k is
Answer:
The null hypothesis is .
The alternate hypothesis is
Step-by-step explanation:
Null hypothesis:
The previously report, the known value.
Alternate hypothesis:
What is questioned(higher, lower, different,...) of the null hypothesis
Previously, an organization reported that teenagers spent an average of 4.3 hours per week, on average, on the phone.
This means that the null hypothesis is .
The organization thinks that, currently, the mean is higher.
That is, higher than 4.3. So
The alternate hypothesis is