Math 4 Unit 2 Functions Test Class 1A Makeup

Front

What is a function?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

Define linear function.

Back

A linear function is a function that can be graphically represented in the Cartesian plane as a straight line, typically in the form f(x) = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the ratio of the vertical change to the horizontal change between two points on the line.

Front

How do you find the value of a function at a specific point?

Back

To find the value of a function at a specific point, substitute the input value into the function's equation and simplify.

Front

What is a quadratic function?

Back

A quadratic function is a polynomial function of degree 2, typically in the form f(x) = ax^2 + bx + c, where a, b, and c are constants.

Front

What does the correlation coefficient (r) indicate?

Back

The correlation coefficient (r) indicates the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What is the purpose of linear regression?

Back

Linear regression is used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

What is the significance of the r-squared (r²) value?

Back

The r-squared (r²) value indicates the proportion of the variance in the dependent variable that is predictable from the independent variable(s), ranging from 0 to 1.

Front

How do you evaluate a function using a regression equation?

Back

To evaluate a function using a regression equation, substitute the desired input value into the regression equation and solve for the output.

Front

What is a data set in statistics?

Back

A data set is a collection of related data points or values that can be analyzed to identify patterns or trends.