Question 1040587
y=x^2-1
when x is -2, (-2)^2=4, and 4-1=3, so y=3
when x is 2, (2^2)=4, and 4-1=3, so y=3
when x is (-1), (-1^2)=1, and 1-1=0
when x=1, y=0
when x=0, x^2-1= -1
graph is symmetrical around the y-axis.  The y-intercept is where x=0, which is -1
{{{graph(300,200,-10,10,-10,10,x^2-1)}}}