To determine which graph represents “x is
at most 7”, we need to understand what this inequality means and how it is
represented on a number line.
“x is at most 7” can be represented as x ≤ 7
means that x includes 7 and all numbers less than 7. On a number line, this is
represented by: A line with a closed circle at 7 and shading to the left.
To compare the given graphs:
Graph A
There is an open circle at 7 and the
shading extends to the right.
This represents x > 7, as it includes
all numbers greater than 7 but not 7 itself.
Graph B
There is a closed circle at 7 and the
shading extends to the right.