Midterm Review

Front

What is a correlation coefficient?

Back

A statistical measure that describes the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of 0.75 indicate?

Back

It indicates a strong positive correlation between the two variables.

Front

How do you set up an equation to compare costs at two different fairs?

Back

Identify the total cost for each fair as a function of the number of rides and set them equal to each other.

Front

What is the equation to find the number of rides for equal value at Frederick and Montgomery County Fairs?

Back

15 + 2.5x = 10 + 3x.

Front

What does it mean for two lines to intersect?

Back

It means they have a common point (x, y) where both equations are satisfied.

Front

How do you find the intersection point of two lines?

Back

Solve the system of equations formed by the two lines.

Front

What does the inequality x ≤ 5 represent on a number line?

Back

All numbers less than or equal to 5, including 5 itself.

Front

What does the inequality x > 9 represent on a number line?

Back

All numbers greater than 9, not including 9.

Front

How do you solve an absolute value equation like |x - 6| + 4 = 10?

Back

Isolate the absolute value, then set up two separate equations: x - 6 = 6 and x - 6 = -6.

Front

What are the solutions to the equation |x - 6| + 4 = 10?

Back

x = 12 and x = 0.