Mathematics for IGCSE & O level - Proportion (Section 2 - No. 18)
If y is directly proportional to x, and y is 6 when x is 4, what is the equation representing this relationship?
y = (2/3)x
y = (3/2)x
y = 2x
y = 6x
Giải thích
y=kx, and 6=k*4 which gives k=3/2. Therefore, y=(3/2)x.