Identify the y-intercept in the equation y = -3x - 1 enter your numerical value only.

The y- intercept is -1.  When you write a linear equation (y=mx+b) , b is the y-intercept.

I believe the correct answers from the choices listed above are option B and C. The line segments AC and BD are the diameters of the circle in the figure. A diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.