Concept:On a number line, a solid (shaded) dot means the number is included (≤ or ≥); an open circle means it is not (< or >). The arrow shows the direction of the other values.Solution:The dot is at 3 and it is solid, so 3 is included.The arrow points to the left, towards 2,1,0,−1,…, so x takes values less than 3.Inequality: x≤3.Key point: The old key gave x≥2, but the dot is at 3 and the arrow points left. Read where the dot is and which way the arrow goes.Answer:Option B (x≤3)