The scatter plots don't show that strong a correlation.
From the test questions, this isn't an "algebra test". It's a word problem decoding test. That's appropriate to programming, where you have to go from an informal specification of the problem to a formal one.
From the test questions, this isn't an "algebra test". It's a word problem decoding test. That's appropriate to programming, where you have to go from an informal specification of the problem to a formal one.