Answer:
Answer is long, so Ill put it in the explanation.
Step-by-step explanation:
Domain: -∞ ≤ x ≤ ∞ (x goes infinitely in both directions)
Range: -∞ ≤ y ≤ 1 (infinite number of negative points, or going down, but stops at positive 1 going up)
y intercept: (0,0) (where the function meets the y-axis)
x-intercepts: (0,0) and (4,0) (where the function meets the x-axis)
minimum: -∞ ( doesnt have a lowest point, essentially there isnt one)
maximum: y = 1 (this is the highest point of the function)
f(6) = -3 (this is asking: when x = 6, what does y equal?)
This parabola is decreasing (it opens downwards)