PLZZ HELP DO QUESTIONS 2,3, and 4, or atleast some of them i have question 1 done

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters