I = PRT
21 = 200 * 0.035 * T
21 = 7T
3 years = T
Direct variation is of the form y=kx. We are given the point (8, -4) so we can solve for k, the constant of variation...
-4=8k, divide both sides by 8
-4/8=k
k=-0.5, so our equation is:
y=-0.5x,
Answer:
B
Step-by-step explanation:
X = 1 & Y = -1 this is the way that we should find x
