Algebra 1A Final Exam Review FA22

Front

What is correlation in statistics?

Back

Correlation measures the strength and direction of a linear relationship between two variables, typically represented by 'r', where -1 indicates a perfect negative correlation, 0 indicates no correlation, and +1 indicates a perfect positive correlation.

Front

What does an r value of 0.09 indicate?

Back

An r value of 0.09 indicates a very weak positive correlation between two variables.

Front

How do you calculate the slope between two points?

Back

The slope (m) is calculated using the formula m = (y2 - y1) / (x2 - x1).

Front

Given the points (-2,-9) and (-1,-3), what is the slope?

Back

The slope is -6.

Front

What is a function in mathematics?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

Does the relation {(1,2), (1,3)} represent a function?

Back

No, because the input '1' has two different outputs (2 and 3).

Front

What does it mean to solve for a variable?

Back

To solve for a variable means to isolate the variable on one side of the equation to find its value.

Front

If w + 4 = -4, what is w?

Back

w = -8.

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

When is the mean the best measure of center?

Back

The mean is the best measure of center when the data is symmetric and not skewed.