Does the parabola $y = 3x^{2}-11x-3$ have a tangent whose slope is $-1$? (Hint: sketch a graph of it.) If so, find the point of tangency and an equation for the tangent line. If not, enter NONE in both answer blanks, and be sure that you can explain your answer.

Point $(x,y)$ = (For example, enter (1,2) including the parentheses.)
Tangent line:   $y$ =