Algebra 1 STAAR Practice 2018-2019 Knowledge

Front

What is a positive correlation in a scatter plot?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What does it mean if two lines have the same y-intercept?

Back

It means that both lines cross the y-axis at the same point.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is zero.

Front

What is the maximum value of a quadratic function?

Back

The maximum value is the highest point on the graph of the quadratic function.

Front

What is the vertex of a quadratic graph?

Back

The vertex is the highest or lowest point of the parabola, depending on its orientation.

Front

What is a negative correlation in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does it mean if two lines are parallel?

Back

Parallel lines have the same slope but different y-intercepts.

Front

How do you find the slope of a line given two points?

Back

The slope is calculated as (y2 - y1) / (x2 - x1).

Front

What is the standard form of a linear equation?

Back

The standard form is Ax + By = C, where A, B, and C are integers.

Front

What is the difference between a linear and a quadratic function?

Back

A linear function has a constant rate of change, while a quadratic function has a variable rate of change and forms a parabola.