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7.7. Linear Function. y = ax + b OR y = mx + b Linear functions just have a single x in the equation. The graph of a linear function is a LINE. Linear Function. Quadratic Function. y = ax 2 + bx + c Quadratic functions: the highest degree is 2 (squared): x 2
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Linear Function • y = ax + b OR y = mx + b • Linear functions just have a single x in the equation. • The graph of a linear function is a LINE.
Quadratic Function • y = ax2 + bx + c • Quadratic functions: • the highest degree is 2 (squared): x2 • The graph of a quadratic function is a parabola or “U”
Cubic Function • y = ax3 + bx2 + cx + d • Cubic Functions: • the highest degree is 3 (cubed): x3 • The graph of a cubic function is like an “S”.
Exponential Function • y = abx • Exponential Function • The variable is in the exponent: abx • The graph of an exponential function is like a sideways parabola.
Power Function • y = axb • Power Function • When you highest degree is different from a 2 (squared) or a 3 (cubed). • Graphs can differ in shape