Answer:
it's the 3rd choice, Y= -3x
C - the value of 2 in Venus' distance is 1/10 the value of earth's distance.
The 2 in Venus' distance represents 200,000
The 2 in Earth's distance represents 2,000,000
Venus's 2 is 1/10 the value of earth's
X + 0.5 + 3x - 2 = 3x + 1.5
X= 3.5
Putting the all x on the right side and distributing all the numbers on the left side