What is the direct variation equation if y varies directly with x and y = -12 when x = 6?

a) y = -2x
b) y = -1/2x
c) y = -6x
d) y = -18x

Plz heeeeeeelp plz give me the answer

(05.08a)triangle abc is transformed to similar triangle a′b′c′ below: a coordinate plane is shown. triangle abc has vertices a at 2 comma 6, b at 2 comma 4, and c at 4 comma 4. triangle a prime b prime c prime has vertices a prime at 1 comma 3, b prime at 1 comma 2, and c prime at 2 comma 2. what is the scale factor of dilation? 1 over 2 1 over 3 1 over 4 1 over 5

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?