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Math·Algebra·Linear equations in two variables

hard

$x$	$y$
$-13$	$-28$
$6$	$48$

The table shows two values of $x$ and their corresponding values of $y$. The graph of the linear equation that represents this relationship passes through the point $\left(\frac{1}{3},a\right)$.

What is the value of $a$?

1

25.33

2

76/3