Scatter Plot Analysis Flashcard

Front

Determine if 0.54856584337009... is rational or irrational and give a reason for your answer. The number 0.54856584337009... is _______ because ____________________________.

Back

irrational, it is a decimal that does not repeat or terminate

Front

Write the number 6,200 in scientific notation.

Back

6.2 × 10³

Front

Find the length of the third side. If necessary, round to the nearest tenth.

Back

7.0

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional grid.

Front

What does a positive correlation in a scatter plot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation in a scatter plot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is the purpose of a trend line in a scatter plot?

Back

A trend line is used to show the general direction of the data points and to help identify the relationship between the variables.

Front

How do you determine the slope of a line in a scatter plot?

Back

The slope is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What does it mean if a scatter plot has no correlation?

Back

No correlation means that there is no apparent relationship between the two variables; the data points do not follow any trend.

Front

What is the formula for calculating the correlation coefficient (r)?

Back

The correlation coefficient (r) is calculated using the formula: r = (nΣxy - ΣxΣy) / sqrt[(nΣx² - (Σx)²)(nΣy² - (Σy)²)], where n is the number of data points.