Understanding the Equations of a Line

What does the slope of a line represent in a linear equation?

• The steepness of the line

• The y-intercept of the line

• The x-intercept of the line

• The length of the line

In the slope-intercept form of a line, y = mx + b, what does 'b' represent?

(a)  

• The slope of the line

• The y-intercept of the line
• The x-intercept of the line

• The midpoint of the line

How do you graph a line using the slope-intercept form?

(a)  

• Plot the y-intercept and use the slope to find ano
• Plot the x-intercept and use the slope to find another point

• Plot any two random points and draw a line through them

• Plot the midpoint and draw a line through it

What does a positive slope indicate about the direction of a line?

• The line rises from left to right

• The line falls from left to right

• The line is horizontal

• The line is vertical

Why is understanding the slope-intercept form useful for graphing lines?

• It allows quick identification of the slope and y-intercept

• It provides the x-intercept directly

• It eliminates the need for a graph

• It shows the length of the line