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Math·Algebra·Linear equations in two variables

hard

A linear relationship between $x$ and $y$ is shown in the table.

$x$	$y$
2	-18.3
4	-17.1
7	-15.3

What is the $x$-coordinate of the $x$-intercept of the graph that represents this linear relationship in the $xy$-plane?

1

32.5