Slope-Intercept Form of Linear Equations

Select the equation that represents the slope intercept form of a line.

• x = my + b

• y = bx + m

• y = mx + b

• y = mb + x

What does the m represent in the equation y = mx + b?

• the y intercept

• the x intercept

• a point

• the slope

What does the y represent in the equation y = mx + b?

• the y intercept

• the x intercept

• a point

• the slope

What is the ratio used to find the slope of a line? Select all that apply.

•  $\frac{\Delta x}{\Delta y}$  

•  $\frac{\Delta y}{\Delta x}$  

•  $\frac{y_{2\ }-\ y_1}{x_{2\ }-\ x_1}$  

•  $\frac{x_2\ -\ x_1}{y_{2\ }-\ y_1}$  

• Ratio of the vertical change to the horizontal change

Identify the slope in the equation.

 $y\ =\ \frac{1}{2}x\ +\ 2$  

Identify the y-intercept in the equation.

 $y\ =\ \frac{1}{2}x\ +\ 2$  

Identify the y-intercept in the equation.

 $y\ =\ -4x\ -6$  

Identify the slope in the equation.

 $y\ =\ -4x\ -6$  

Select ALL points that represent a y-intercept.

• (0, 3)

• (4, 0)

• (-2, 0)

• (0, 1/2)

• (0, -5)

Write the equation of the line (slope-intercept form) with the given slope/rate of change and y-intercept.

 $m\ =\ 4\ \ \left(0,\ -9\right)$  

• y = -4x - 9

• y = 4x - 9

• y = -9x + 4

• y = 9x + 4