Answer:
They represent the rise and run of the graph.
Step-by-step explanation:
The difference between the x-axis of the points represents the "run" of the graph (or how much you should run along x-axis to get to the next point.)
The difference between the y-axis of of the points represents the "rise" of the graph (or how much you should rise up the y-xis to get to the next point).
The ratio of rise to run is the slope of the graph, which tells us how many steps should we take on the y-axis for every step we move forward on the x-axis.
First you distribute 4 to 2x and 3. Then after you do that you get 8x+12=10x
Answer: 28.6
Step-by-step explanation:
Answer:
The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence interval
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
is the margin of error.
95% confidence interval
So
, z is the value of Z that has a pvalue of
, so
.
We have that:

So





The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.