Answer:
The answer for (a) is at the picture
(b) The vertex is (-2,7)
(c) Yes the parabola open downward
(d) -(x+2)^2+7 the turning point is at (-2,7) since it is where the group curves
Step-by-step explanation:
1/2=4/8 (1×4 and 2×4)
Then 4/8-1/8= 3/8 (4-1=3)