Sometimes when you're graphing a linear equation, you get that u-shaped line called a parabola. And sometimes you get a v-shaped line,and I forgot what you call that..

You get a parabola from a quadratice equation, which is NOT linear.

A real v with a point on the bottom comes from y = m |x| or y = constant times absolute value of x
where m is any old constant number but zero

but is there a specific name for a real v with a point on the bottom?

Maybe, but I do not know it.

The shape you are referring to is called a V-shaped line, and it is called a "V-shape" or a "V-curve." However, it is important to note that V-shaped curves are not typically associated with graphing linear equations.

In graphing linear equations, you usually obtain straight lines rather than curves. A linear equation represents a straight line on a graph, and it takes the general form of y = mx + b, where m represents the slope of the line, and b represents the y-intercept.

On the other hand, the U-shaped curve you mentioned is called a "parabola." Parabolas are obtained when graphing quadratic equations, which have the general form of y = ax^2 + bx + c, where a, b, and c are constants.

To summarize, V-shaped lines are not typically associated with graphing linear equations, and they are not as commonly mentioned as parabolas when discussing graphical representations of equations.