Graphs:
- Graph 'a' is a parabola opening upwards, with its vertex at the origin. This corresponds to a function of the form y = ax2, where a > 0.
- Graph 'б' is a straight line passing through the origin with a positive slope. This corresponds to a function of the form y = kx, where k > 0.
- Graph 'в' is a parabola opening downwards, with its vertex at the origin. This corresponds to a function of the form y = ax2, where a < 0.
- Graph 'г' is a straight line passing through the origin with a negative slope. This corresponds to a function of the form y = kx, where k < 0.
Formulas:
- 1) y = -4x
- 2) y = 4x2
- 3) y = 4x
- 4) y = -4x2
Краткое пояснение: Парабола вида y = ax2 всегда проходит через начало координат. Если a > 0, ветви параболы направлены вверх (график 'a'), если a < 0, ветви направлены вниз (график 'в'). Прямая вида y = kx всегда проходит через начало координат. Если k > 0, прямая идет вверх (график 'б'), если k < 0, прямая идет вниз (график 'г').
Matching:
- Graph 'a' (parabola opening upwards) matches formula 2) y = 4x2.
- Graph 'б' (straight line with positive slope) matches formula 3) y = 4x.
- Graph 'в' (parabola opening downwards) matches formula 4) y = -4x2.
- Graph 'г' (straight line with negative slope) matches formula 1) y = -4x.
Ответ: a - 2, б - 3, в - 4, г - 1