标题: 二次函数介绍草图的画法 [打印本页] 作者: 侯思远 时间: 2021-1-22 08:21 标题: 二次函数介绍草图的画法 二次函数介绍草图的画法：
Note that sketches are to be completed by hand. It is intended that all critical points are plotted on the coordinate plane and that the general shape is correct.
请注意，草图将由手工完成。它的目的是在所有关键点绘制在坐标平面上，并且一般形状是正确的。
Remember:
Use a pencil, graph paper, and ruler to complete your graphs. Neatness increases the readability and accuracy of your graph.
Linear relations are straight lines. Non-linear relations will require that you plot the graph in a smooth curve.
Add labels. Where possible include: equation of the relation, your name, as well as the unit and activity number.
•使用铅笔、图形纸和标尺完成图形。图像整洁可提高图形的可读性和准确性。
•线性关系是直线。非线性关系需要以平滑曲线绘制图形。
•添加标签。如果可能，包括：关系方程、您的姓名以及单位和活动编号。
Critical Points / Areas
All sketches will start with you finding the critical points of the relation.
所有草图都将从查找相关的关键点开始。
Intercepts: Locating the x-intercepts and y-intercepts can assure you of some accuracy when sketching the graph of a quadratic or exponential function.
End behaviour: The sketch should display typical behaviour of the relation you are working with. In this unit, you are working with quadratics. If a > 0, then both ends of the graph point up. If a < 0, then both ends of the graph point down.
Vertex: The vertex of the function is (h, k) when the equation is written in vertex form, y = a(x - h)2 + k.
Step Pattern: Quadratic relations have a step pattern that can be used to locate the next point in the graph.
Table of Values: A table of values can be generated by substituting known values for the independent variable into the equation of the relation.