College Algebra 7th Edition

RECALL: The point $(x, y)$ has: $x$ = directed distance of the point from the y-axis (negative when to the left of the y-axis, positive when to the right) $y$ = directed distance of the point from the x-axis (negative when below the x-axis, positive when above) Thus. the set $\left\{(x, y)|x=-4\right\}$ represents the set of points that are 4 units to the left of the y-axis. These points form a horizontal line whose equation is $x=-4$. (refer to the attached image in the answer part)