9.5 STAAR Review Linear Key Features

What does it mean if two lines are parallel?

• Two lines are parallel if they have the same slope but different y-intercepts.

• Two lines are parallel if they intersect at a right angle.

• Two lines are parallel if they have different slopes and the same y-intercept.

• Two lines are parallel if they are on the same plane and do not intersect.

What is a y-intercept?

• The point where a graph crosses the x-axis.

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

• The slope of the line at a given point.

• The value of x when y is zero.

What is the equation of a line with an x-intercept of -1 and a y-intercept of 5?

• y = -1x + 5

• y = 1x + 5

• y = -5x - 1

• y = 5x - 1

What happens to the graph of a line if the slope is zero?

• The line becomes vertical, indicating infinite change in y as x changes.

• The line is horizontal, indicating no change in y as x changes.

• The line curves upwards, indicating a positive change in y as x changes.

• The line curves downwards, indicating a negative change in y as x changes.

What does a negative slope indicate about a line?

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

• A negative slope indicates that as x increases, y also increases, showing a direct relationship.

• A negative slope indicates that the line is horizontal and does not change.

• A negative slope indicates that the line is vertical and undefined.

What does it mean if a line has an x-intercept of -5?

• It means that the line crosses the x-axis at the point (-5, 0).

• It means that the line is parallel to the x-axis.

• It means that the line has a slope of -5.

• It means that the line does not intersect the x-axis.

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

• By calculating the area under the curve

• By using the rise/run method or slope formula

• By finding the intercepts of the graph

• By averaging the values of the data points

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

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

• y = ax^2 + bx + c, which is the quadratic form.

• y = mx + c, where m is the slope and c is the constant.

• y = b/x + m, which is the inverse form.

How do you find the y-intercept from the equation y = 3x + 7?

• The y-intercept is 3.

• The y-intercept is 0.

• The y-intercept is 7.

• The y-intercept is -7.

What is an x-intercept?

• The point where a graph crosses the y-axis.

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

• The maximum value of a function on a graph.

• The minimum value of a function on a graph.