 So let's try to graph the quadratic function y equals minus x squared minus 2x plus 1, and we'll do that by finding the vertex and the y-intercept first. So remember, the vertex is the point where the line of symmetry intersects the graph. Of course, that's only useful if you remember how to find the line of symmetry. So the line of symmetry for y equals ax squared plus bx plus c has equation x equals minus b over 2a. And so the line of symmetry is going to be x equals minus b over 2a, where b is the coefficient of x and a is the coefficient of x squared. And so here b is negative 2 and a is negative 1. So we're placing those in our formula and simplifying. Gives us x equals negative 1 as our line of symmetry, and this x value will be the x-coordinate of the vertex, and the set of the vertex is located at x-coordinate negative 1. Once we know the x-coordinate of the vertex, we can find the y-coordinate of the vertex from the equation. So we know that y equals minus x squared minus 2x plus 1. Our x-coordinate is negative 1, so we'll replace and compute. And that tells us the y-coordinate is 2, and so our vertex is at negative 1, 2. So the y-intercept will be where x is equal to 0. So the y-coordinate can be found again from the equation. If x equals 0, then y is equal to 1, and so the y-intercept is at x equals 0, y equals 1, 0, 1. Now to graph this on my open math, we need to plot the vertex and a point on the curve. Then graph the parabola by selecting the vertex first and then the point. So first we'll make sure that our point tool is selected, so we'll go to this thing that looks like a point and select it. Then we want to go to the first point, the vertex negative 1, 2, and put a point there. We want to go to the other point, 0, 1, and put a point there. Now if we want to draw the parabola, we'll switch to the parabola tool, which is cleverly disguised to look like a parabola. And at this point we have to be careful if we draw the parabola, we want to select the vertex first and then a point on the parabola. So we'll move to the vertex, and as we move to the other point, my open math will try to track the parabola, so be careful not to select that second point until you're absolutely sure it's the correct point. So we'll move to that second point, and select it, submit, and get our green check mark.