Answer:
your slope is 1
Step-by-step explanation:
You would use the formula y2-y1/x2-x1=m you would do -12-(-9)/-6-(-9)
which would give you 3/3 which simplifies to 1.
(2,0) and (4,0)
The roots of the parabola are the points where the value of the function is zero, i.e., where the graph crosses the x-axis.