⁦Translating, reflecting and stretching graphs⁩

⁦Move the graph of y = (x − h)² + k with sliders, read the turning point of a parabola, see where f(2x) sends a point, and combine several transformations on one parabola⁩.

لم يُترجَم هذا المختبر إلى هذه اللغة بعد.

الدليل

⁦y = f(x) + k moves the graph up by k (a vertical⁩ انسحاب). ⁦y = f(x − h) moves it right by h⁩: ⁦the sign inside the bracket acts the opposite way, so f(x + ٢) moves 2 to the left⁩.

⁦For y = (x − h)٢ + k the turning point is at (h، k)⁩. ⁦Completing the square, x٢ − ٤x + ١ = (x − ٢)٢ − ٣, gives the turning point (٢، −٣)⁩.

⁦A number multiplying outside (af(x)) stretches the heights, and a negative one turns the graph upside down (a⁩ انعكاس). ⁦A number multiplying x inside (f(٢x)) acts the opposite way⁩: ⁦the graph is squashed in from left and right⁩.