The delivery zone
A shop delivers for free when the trip is under 5 km.
That is not one distance. It is every distance below 5.
On a graph, every distance below a limit is a whole region.
So an inequality shades an area instead of drawing a thin line.
Read this step as text
A shop delivers for free when the trip is under 5 km.
That is not one distance. It is every distance below 5.
On a graph, every distance below a limit is a whole region.
So an inequality shades an area instead of drawing a thin line.