Reading down the first column shows that the percentage decreases by 5 points for each one unit we increment \(b\) by. Likewise, reading across the first row shows that the percentage decreases by 5 points for each unit we increment \(a\) by. Based on this, what can you say about how much the percentage would decrease if you incremented *both *\(a\) and \(b\) by one unit each? What would happen to the percentage if you incremented \(a\) by 5 units and \(b\) by 3 units? What would happen if you increased \(a\) by 7 units and \(b\) by 8 units? Where does all of this lead you?