SLOPE INTERCEPT FORMAlgebra I

WHAT IS THE SLOPE INTERCEPT FORM?

y = mx + b

Slope = rise run

y-intercept(0,y)

HOW TO WRITE AN EQUATION USING SLOPE:

When a graph is given…

Step 1, Plan: Know that an equation of a line has to be written in the slope intercept form. y = mx + bStep 2, Given: From the graph given, determine the y-intercept and the slope

Step 3, Plug/Solve: plug in for the m and the b.Step 4, Write: Write a statement using the equation. EX: The equation of the line is …

EXAMPLE

HOW TO GRAPH AN EQUATION IN SLOPE-INTERCEPT FORM

Step 1, Plan: Know that an equation of a line has to be written in the slope intercept form. y = mx + bStep 2, Given: From the graph given, determine the y-intercept and the slope

Step 3, Plug/Solve: plot the y-intercept then use th slope to plot the second point.

Step 4, Write: Write the equation across the line.

EXAMPLE

HOW TO GRAPH AN EQUATION IN STANDARD FORM

Step 1, Plan: Isolate for y to put it in slope-intercept form from standard form Ax + By = C to y = mx + bStep 2, Given: From the equation given, recognize that it is in standard form Ax + By = CStep 3, Plug/Solve: to get the y by itself, do the opposite operation to both sides then simplify. Use the y-intercept and slope to plot the line.Step 4, Write: Write the equation across the line.

EXAMPLE