Determine the negative reciprocal of the slope. Plot the first point using the value of B following the directions described above.
If you said undefined, you are right on. We already know that the slope is 3. Search for: Write the equation of a line parallel or perpendicular to a given line If we know the equation of a line, we can use what we know about slope to write the equation of a line that is either parallel or perpendicular to the given line.
Finding the second point takes a little algebra work. Pat yourself on the back if you said undefined. You may also need to find a line that passes through a particular point at x, y.
You might say this hey, this is a bizarre character, how do I get this into slope-intercept form, where's the x? The constant A determines the slope of the line and B is the value of the y-intercept. Slope of the perpendicular line: Since the slopes of perpendicular lines are negative reciprocals of each other, what do you think the slope of any perpendicular line to this line is?
Line A, it's 2y is equal to 12x plus In your line equation, set the value of y to zero, then solve for x.
We needed to write it this way so we could get the slope.