MM_F5_6 Area & Gradient Under A Graph_1

斜度 面积

Chapter 6 Gradient And Area Under A Graph

6.1 Quantity represented by the gradient of a graph

变化率

- The gradient of a graph represents the rate of change of a quantity on
the vertical axis with respect to the change of another quantity on the
horizontal axis.

**记住 Rate of change

 y2  y1
x2  x1

Example:

y2 1. 找出 x1 x2
y1
x1 = 0, x2 = 3

2. 找出 y1 y2

y1 = 220000, y2 = 260000

3. 不要写错/不要倒转

x1 , y1 配对的
x2 , y2

x1 x2 4. 用 Formula 计算

Rate of change  260000  220000 Rate of change  y2  y1
30 x2  x1

 RM 13333.33 per year

y1=200 y2  y1
x2  x1

Rate of change  0  200
3.5  0

 57.14 kmh1

y2 = 0

x1 = 0 x2 =3.5

Exercise:

1.

1. 66.67 kmh2
2. 20 kmh1
3. 4 ms1