Find the slope of a line tangent to the curve y= x" + 3x at the point P( - 1, - 2) by finding the limit of the slopes of the secant lines PQ where Q has x-values - 0.5, - 0.9, - 0.99, and -0.999. Sketch the curve and tangent line. Complete the following table. Q 2 Q3 QA X7 - 0.5 - 0.9 - 0.99 - 0.999 m (Type integers or decimals.)