Question

y = 4

y = -4

x = -4
x = 4
http://learn.flvs.net/webdav/assessment_images/educator_algebra1/pictures/v8/04/00/04_00_group8_graph2.gif

Answer 1

this line is parallel to the x-axis so its equation is of the form y=k

Answer 2

y=4.... you know you use y because along the line the x values are always changing

Answer 3

Thanks