Understanding Linear Equations from Graphs

What is the general form of the slope-intercept equation?

• y = ax + b

• y = a/x + b

• y = ax^2 + bx + c

• y = mx + b

In the slope-intercept form, what does the 'm' represent?

• The y-intercept

• The slope

• The x-intercept

• The constant term

How do you determine the y-intercept from a graph?

• Find where the line crosses the y-axis

• Find the midpoint of the line

• Find where the line crosses the x-axis

• Calculate the slope

What is the slope of a line if the rise is 1 and the run is 1?

• -1

• 2

• 1

• 0

In the second example, what is the y-intercept of the line?

• 0

• -1

• 1

• 2

What is the slope of the line in the second example?

• -1/3

• 3

• 1/3

• -3

In the third example, what is unique about the y-intercept?

• It is negative

• It is zero

• It is positive

• It is undefined

What is the slope of the line in the third example?

• 1

• -2/3

• 0

• 2/3

For a horizontal line, what is the slope?

• -1

• 0

• 1

• Undefined

What is the equation of a horizontal line that crosses the y-axis at 4?

• y = 4x

• y = 0

• y = 4

• x = 4