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Speed - Time Graphs
- Acceleration ⟶ find positive gradient of the line, m/s²
- Deceleration ⟶ find negative gradient, m/s²
- Horizontal line above 0 m/s² = Constant Speed, m/s
- Distance = Area under the line
Estimation of Area under the curve
• Concaving curve = underestimate
• Convex curve = overestimate
Equation of a Circle
- x² + y² = r²
- Centre = (a,b) ⟶ r² = (x - a)² + (y - b)²
- Radius cannot be a negative value.
When it comes to IGCSE/GCSE Maths, do you remember which direction does a graph move?
Transformations of graphs, y=f(x)
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/610730_194278.png)
Inside bracket = x axis
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/535289_13612.png)
in vector, a = inverse the sign in the bracket.
Outside bracket = y axis
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/23852_784152.png)
in vector, a = same as it is outside the bracket.
That's the end of the topic!
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/919150_457509.png)
Drafted by Bonnie (Mathematics)