Question

If the relationship is proportional, what is the missing value from the table?

x
y
–3
–1
–12
?
–30
–10
–8
–6
–5
–4

Answer 1

y is proportional to x. From (-3, -1) (or (-30, -10)) the constant k = y/x = (-1)/(-3) = 1/3.
So y = (1/3)x and for x = -12: y = (1/3)(-12) = -4.