Question

what is the distance between the points (25, 14) and (7, 14) in the coordinate plane?
a. 9 units
b. 18 units
c. 11 units

Explanation:

Step1: Identify the formula for distance between two points with same y - coordinate

For two points $(x_1,y_1)$ and $(x_2,y_2)$ with $y_1 = y_2$, the distance $d=\vert x_1 - x_2\vert$. Here $x_1 = 25$, $x_2=7$ and $y_1 = y_2=14$.

Step2: Calculate the distance

$d=\vert25 - 7\vert$.
$d=\vert18\vert = 18$.

Answer:

B. 18 units