Writing Linear Equations from Graphs

What is the y-intercept (b) in the equation y = mx + b?

• The point where the line crosses the y-axis

• The slope of the line

• The steepness of the line

• The point where the line crosses the x-axis

In the equation y = mx + b, what does 'm' represent?

• The x-intercept

• The constant term

• The slope

• The y-intercept

How do you calculate the slope of a line?

• Rise over run

• Difference of x and y coordinates

• Run over rise

• Sum of x and y coordinates

In the first example, what is the y-intercept (b) of the line?

• 2

• 4

• 0

• -2

What is the slope (m) of the line in the first example?

• 3

• 2

• 4

• 1

What is the linear equation derived in the first example?

• y = 2x + 4

• y = 4x + 2

• y = x + 4

• y = 2x - 4

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

• 2

• -2

• 0

• 4

What is the slope (m) of the line in the second example?

• 3/2

• 2

• 1/2

• 2/3

What is the linear equation derived in the second example?

• y = 2/3x + 2

• y = 3/2x - 2

• y = 2/3x - 2

• y = 2x - 2

In the third example, what is the slope (m) of the line?

• -3/4

• 3/4

• -4/3

• 4/3