Marry used ¼ litres of cooking oil this week and left with ½ litres. How much cooking oil Marry has at the beginning of the week

The length of a rectangle is shown below: on a coordinate grid from negative 6 to positive 6 on the x-axis and on the y-axis, two points a and b are shown. the point a is on ordered pair 1, 2, and the point b is on ordered pair negative 2, 2. a straight line joins the points a and b. if the area of the rectangle to be drawn is 12 square units, where should points c and d be located, if they lie vertically below the line that connects b and a, to make this rectangle?