In the xy-coordinate plane, the graph of y =-x^2+9 intersects line l at (p,5) and (t,-7). What isthe least possible value of the slope of l ?A 6B 2C -2D -6E -10 具体计算过程和答案
问题描述：
In the xy-coordinate plane, the graph of y =-x^2+9 intersects line l at (p,5) and (t,-7). What is
the least possible value of the slope of l ?
A 6
B 2
C -2
D -6
E -10
具体计算过程和答案
答