9.5 STAAR Review Linear Key Features

Front

What is an x-intercept?

Back

The x-intercept is the point where a graph crosses the x-axis, indicating the value of x when y is zero.

Front

How do you find the x-intercept of a linear equation?

Back

To find the x-intercept, set y to 0 in the equation and solve for x.

Front

What is a y-intercept?

Back

The y-intercept is the point where a graph crosses the y-axis, indicating the value of y when x is zero.

Front

How do you find the y-intercept of a linear equation?

Back

To find the y-intercept, set x to 0 in the equation and solve for y.

Front

What does the slope of a line represent?

Back

The slope represents the rate of change of y with respect to x, indicating how steep the line is.

Front

How is the slope calculated between two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that as x increases, y decreases, showing an inverse relationship.

Front

What is the significance of the x-intercept in a loan payment graph?

Back

The x-intercept represents the number of payments needed to fully repay the loan.

Front

How can you determine the rate of change from a graph?

Back

The rate of change can be determined by calculating the slope of the line on the graph.