The consumption of coke would would increase if coke is a normal good. The consumption of Coke will fall if the income effect is dominant but would increase if substitution effect dominates even if the good is inferior
In the graph the budget constrait line is given by
[tex]P_{s}x + P_{c}y < m[/tex]
where m is the income
the budget line's u intercept is [tex]m/p_{c}[/tex]
and the x intercept is [tex]m/p_{s}[/tex]
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