7th PBA Test #4 Review

Front

What is the mean of a set of numbers?

Back

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

Front

How do you calculate the mean of the following numbers: 9, 8, 12, 6, 10?

Back

Add the numbers: 9 + 8 + 12 + 6 + 10 = 45. Then divide by the count (5): 45 / 5 = 9.

Front

Back

To solve for a, multiply both sides by -8/3: a = -48 * (-8/3) = 128.

Front

Back

Cross-multiply and simplify to find a. The solution is a = 7.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise/run).

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Use the formula: slope = (y2 - y1) / (x2 - x1).

Front

What does it mean if the slope of a line is -1?

Back

A slope of -1 indicates that for every unit increase in x, y decreases by one unit, resulting in a downward slant.

Front

Back

-19 is a negative integer, representing a value that is 19 units below zero.

Front

Back

Substitute x with 8: 3(8) - 5 = 24 - 5 = 19.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values).