Hello!
We know that any given point on a graph takes the form (x,y). The x-coordinate provides the horizontal position (left & right) while the the y-coordinate provides the vertical position (up & down). These values are all relative to the origin (zero). We’ll begin by analyzing the position of Point A:
Start at the origin (0). Point A can be reached by moving 2 units to the right (positive) and 3.5 units upward (positive). Consequently, the coordinates for this point are (2,3.5). The y-coordinate (3.5) is greater than zero. Therefore, Point A is one of the correct answers.
Now we’ll do the same for Point B. Start at the origin and move 2.5 units to the right (positive) and 2 units downward (negative). This gives us the coordinates (2.5,-2). The y-coordinate (-2) is less than zero. Therefore, we can eliminate Point B.
Continue the process with Point C. Start at the origin and move 1 unit to the left (negative) and 1.5 units downward (negative). This gives us the coordinates (-1,-1.5). The y-coordinate (-1.5) is less than zero. Therefore, we can eliminate Point C.
Continue the process with Point D. Start at the origin and move 2.5 units upward (positive). This gives us the coordinates (0,2.5). The y-coordinate (2.5) is greater than zero. Therefore, Point D is one of the correct answers.
We have now proven that Points A and D both have a y-coordinate greater than zero.
I hope this helps!
