y=3x？ There is a formula in translation, adding left and subtracting right. Translate one unit to the left, that is, y=3(x+ 1)? . y=3x？ It is easy to know that the vertex is (0,0) and the coordinate is (-1, 0) after the vertex is translated to the left by one unit. Translation from left to right means that x changes. Translation up and down means y change.