Question

Which shows solutions to x + 4y = 9 if x and y must be whole numbers.

A.
{(0, 9), (1, 5), (2, 1)}

B.
{(2, 1), (1, 6), (0, 9)}

C.
{(0, 9), (1, 4), (2, 1)}

D.
{(1, 2), (5, 1), (9,0)}

Answer 1

try substituting y=0
so it will be x+4(0)=9
which means x=9 when y=0
find in the solution sets where there is a (9,0)

Answer 2

i think it's d because you use 1,2 ,5,1 and 9,0 in for x+4y=9