Algebra Support Final Exam Review

Front

What is the formula for the cost C(x) of using x minutes of airtime with the Roaming Cell Phone Company?

Back

C(x) = 2x + 15

Front

Back

h(5) = -12

Front

What is the correlation coefficient and what does it indicate about the relationship between two variables?

Back

The correlation coefficient indicates the strength and direction of a linear relationship between two variables. A value of -0.75 indicates a strong negative linear association.

Front

What is the sum of two rational numbers?

Back

The sum of two rational numbers is never irrational.

Front

Define a linear function.

Back

A linear function is a function that can be graphically represented as a straight line, defined by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

What does the slope of a linear function represent?

Back

The slope represents the rate of change of the function; it indicates how much y changes for a unit change in x.

Front

What is the y-intercept of a linear function?

Back

The y-intercept is the value of y when x = 0; it is the point where the line crosses the y-axis.

Front

How do you find the distance between two points A(x1, y1) and B(x2, y2)?

Back

Front

What does a negative correlation coefficient indicate?

Back

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

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction p/q of two integers, where p is the numerator and q is the denominator (q ≠ 0).