Question 409397
The xy-plane (usually named Cartesian plane, after mathematician Rene Descartes) is just like a number line, except in two dimensions. The function {{{f(x) = -5}}} is similar to saying {{{y = -5}}} since y is a function in terms of x. However this is not always the case!


The graph {{{y = -5}}} is a horizontal line in which the y-coordinate is -5, regardless of x:


{{{graph(200, 200, -10, 10, -10,10, -5)}}}


The graph lies in the third and fourth quadrants (look in your textbook or online which quadrant is which).