Shortcuts in Graphing Linear Functions
Shortcuts in Graphing Linear Functions By: RICHARD R. RAQUEÑO To graph a linear function quickly, use its slope-intercept form, y = mx + b. Plot the y-intercept, (0, b), and then use the slope, m = rise/run, to find a second point. A positive slope means to move up and to the right , while a negative slope means to move down and to the right. Connect these two points to draw the line. Step-by-Step Graphing Using the Slope-Intercept Form Step 1: Rewrite in slope-intercept form (y = mx + b) If the equation isn't in y = mx + b form, rearrange it to solve for y. Step 2: Identify the y-intercept (b). This is the point where the line crosses the y-axis, and it's represented by the 'b' value in the equation. Plot this point on the y-axis. Step 3: Identify the slope (m). This is represented by the 'm' value in the equation. Step 4: Use the slope to find another point. Write the slope as a fraction, if it's not already (e.g., -2 can be -2/1). Rise: Move vertical...