Equations of parallel and perpendicular lines with Desmos
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Last updated about 6 years ago
6 questions
1
1
1
1
1
1
Open the website:
https://www.desmos.com/calculator
We want to answer the question:
What is the equation of the line that is parallel to the line y=-3/4x+2 that goes through the point (-4, 2)?
On desmos.com, graph the original equation by typing y=-3/4x+2 in the first line.
On desmos.com, graph the point by typing (-4, 2) in the second line.
It should look like this.
Question 1
1.
Our new line needs to be parallel to the original line. Parallel lines have the SAME slope. What is the slope of the new line? Type that on line #3 in desmos.
Question 2
2.
To write the equation of the line, we need two things. What is one?
Question 3
3.
What is the other one?
Start at the point and count down 4, over 3 until you land on the y-intercept.
Question 4
4.
What is the y-intercept
Add the y-intercept to your equation on line #3.
Question 5
5.
Is your equation parallel to the original line (y=-3/4x+2)
