How many number lines comprise the basic parts of a cartesian coordinate system?

2 answers:

6 0

The correct answer is 2.

Explanation:

The Cartesian coordinate system is made up of 2 axes, the x-axis and the y-axis.

Each axis is a number line; the x-axis is a number line that runs horizontally across the graph, and the y-axis is a number line that runs vertically along the graph.

iogann1982 [59]3 years ago

3 0

Answer:

Step-by-step explanation:

Cartesian coordinate system also known as rectangular system of coordinates has two number lines mutually perpendicular to each other cutting at the origin.

The horizontal line is called the x axis and the vertical line is called the y axis.

The point of intersection is the origin. The plane is divided into four equal quadrants by these two lines. I quadrant has both x and y positive, II quadrant has (x,y) as (negative, +ve), III quad (-,-) and IV (+,-)

This enables to graph any two dimensional functions as graphs.

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g People between the ages of 65 and 70 were studied to see if those who exercise more were healthier. One measure of health was

liubo4ka [24]

Answer:

If the person selected had high blood pressure, the probability that he or she did not exercise is P=0.643.

Step-by-step explanation:

We have a group of people between agss of 65 and 70.

They are divided in two groups regarding their amount of exercise: "none", "moderate" and "high".

The response variable is blood pressure, that was categorized as "normal"or "high".

Then, we have the frequencies table as:

Amount of exercise None Moderate High

Blood pressure High 54 23 7

Blood pressure Normal 86 76 32

We have to calculate the probability that, given that the person had high blood pressure, he or she did not exercise.

If the person had high blood pressure, it can be of the any of the 3 groups of exercise amount. There are 54 people with high blood pressure that did not exercise, 23 that did moderate amount of exercise, and 7 that did a high amount.

Then, the probability can be calculated dividing the amount of people that had high blood pressure and did not exercise, by all the people that have high blood pressure (regarding the amount of exercise):

$P(N | HP)=\dfrac{54}{54+23+7}=\dfrac{54}{84}=0.643$