"two less than 3/2 of a number (x) is no more than 5 1/2" 3/2x-2</5 1/2 (</ means less than or equal to) simplify 1.5x-2 </5.5 +2 both sides 1.5x</7.5 ÷1.5 both sides x</5 circle is closed arrow is to the left (1st number line )
"the sum of two times a number (x) and -2 is at least 8" 2x+-2>/8 (>/ means greater than or equal to) 2x-2>/8 +2 both sides 2x>/10 ÷2 both sides x>/5 circle is closed arrow is to the right (4th number line)
"seven subtracted from 4 times a number (x) is more than 13" 4x-7>13 +7 both sides 4x>20 ÷4 both sides x>5 circle is open arrow is to the right (2nd number line)
"four added to 3 times a number (x) is less than 19" 3x+4 <19 -4 both sides 3x <15 ÷3 both sides x <5 circle is open arrow is to the right (3rd number line)
None of these best represents the sea level because the sea level is 0, which is neither negative nor positive and the whale is at 3000 below sea level and the Griffon is at 37,000 above sea level.
