Does the equation 2x-4y=0 represent a direct variation

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Which shows a reasonable estimation for 124% of 42 using the distributive property?