The area of the rectangle shown in the graph in is 54 units²
What is area?
Area is a measure of the extent of a two-dimensional surface, quantifying the amount of space it occupies. It is expressed in square units.
A rectangle is a quadrilateral with opposite sides equal and the area of a Triangle is expressed as;
A = l × w
where A is the length and w is the width.
from the graph ;
the length = 9 units
width = 6 units
Area of the triangle = 9 × 6
= 54 units²