Mathematics for IGCSE & O level - Functions (Section 1 - No. 13)
Which function is represented by this mapping diagram: Domain: {-1, 0, 1, 2} Range: {9, 12, 15, 18}?
h(x) = 3(x+4)
h(x) = 3x+12
h(x) = 3x + 15
h(x) = 9x
解释
Check different values. For example, if x = -1, then h(x) = 3(-1)+12=9