To find the distance between two points in a coordinate plane, we can use the distance formula, which is:
D = √[(x2 – x1)² + (y2 – y1)²]
Here, (x1, y1) = (3, 8) and (x2, y2) = (1, 9).
Plugging in these points into the formula:
D = √[(1 – 3)² + (9 – 8)²]
D = √[(-2)² + (1)²]
D = √[4 + 1]
D = √5
Therefore, the distance between the points (3, 8) and (1, 9) is √5, which is approximately 2.24 units.