What is the domain and range of #y=x^2-3#?
This is a simple 2nd degree equation with no denominator or anything, so you will always be able to choose ANY number for x, and get a "y" answer. So, the domain (all possible x-values) is equal to all real numbers. The common symbol for this is
However, the highest degree term in this equation is an
This means that whatever the y-intercept is is the lowest point of the parabola. Luckily, that point is simply the
So, the range of this equation is from