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Let's find the slope of the line using the points (0 , 4) and (-8 , 0) from the given graph :

Slope (m) :

hence, the correct choice is C

i think the answer is b

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated