Skin tags that have changed color or bleed may require your doctor's evaluation and reassurance. Rarely, thrombosed skin tags may be a sign of another condition and need to be biopsied.
The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
Remember how we're looking at the vertex's let's look at the let's try to find the vertex for my y two functions which is the one that has the side to side and vertical movement. Remember when you're looking for the vertex in a table, you're looking for where your y values change from increasing and decreasing.