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# Algebra- Linear Equations

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1. How do we write the equation of a horizontal line? What would be an example?
2. How do we write the equation of a vertical line? What would be an example?
3. The points (3,9), (5,13), (15,33), (34,71), (678, 1359), and 1234,2471) all lie on M. The points (3,-9), (5,-11), (15,-21), (43,-40), (678, -684), and (1234, -1240) all lie on line N.

a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis.

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(1) The equation of a horizontal line is of the form y = k, where k is a constant.

For example, y = 2 is a horizontal line which is 2 units above the x- axis.

(2) The equation of a vertical line is of the form x = k, where k is a ...

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