6.1 and 6.2
It's math, yo - James Avault and Alec Tull
Important Properties of a Normal Curve
2. The curve is symmetrical about a vertical line through the mean.
3. The curve approaches the horizontal axis but never touches or crosses it.
4. The inflection points between cupping upward and downward occur above the mean + o and the mean - o.
5. The area under the entire curve is 1.