Unit 4 · Class 9 IB MYP · Formula Sheet
Linear & Non-Linear Functions Formulas — Class 9 IB MYP
Analyze and graph linear, quadratic, and exponential functions and their transformations.
Key Formulas
Linear Function
f(x) = mx + c
Quadratic Function
f(x) = ax^2 + bx + c
Vertex Form
f(x) = a(x - h)^2 + k
Vertex at (h, k)
Axis of Symmetry
x = -\dfrac{b}{2a}
Exponential
f(x) = a \cdot b^x
Worked Examples
1Using: Supplementary Angles
If one angle is 65 degrees, find its supplement.
Step 1: Supplement = 180 - 65
Step 2: = 115 degrees.
Answer: 115 degrees
2Using: Vertically Opposite
Two lines intersect. If one angle is 40 degrees, find the vertically opposite angle.
Step 1: Vertically opposite angles are equal.
Step 2: The angle = 40 degrees.
Answer: 40 degrees
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