# How do you graph the function #f(x)=-4#?

##### 1 Answer

Dec 14, 2014

This function is a constant so that for every value of x has always the same value of y, that is -4.

A general straight line has the following form as a function:

y = f(x) = ax+b

where a is the slope of the line and b the intercept with the y axis.

Now your function has the form:

f(x) = 0x - 4

It has slope a = 0 so it never changes (a constant) and intercepts the y axis in -4 and remember: NEVER CHANGES!!!

So, you can build your graph giving values of x say, 1, 2, 3,...and y will always be -4 giving a straight line passing through -4 and parallel to the x axis.