Find a point on the y-axis that is equidistant from (-5,2) and (9,-2).
A point on the y-axis is always represented as (0, y).
Answer: The point on the y-axis that is equidistant from (- 5, 2) and (9, -2) is (0, -7).
Let us proceed step by step.
Explanation:
Let us consider the point on the y-axis to be (0, y) as the x-coordinate is 0 on the y-axis.
So,the point (0, y) is equidistant from (- 5, 2) and (9, -2).
Since their distance is equal we can apply the distance formula.
Applying distance formula,
d = √[(x2 − x1)2+(y2 − y1)2]
= √[{0 - (- 5)}2 + (y - 2)2] = √[(9 - 0)2 + ( -2 - y)2]
Now simplifying step by step to find the value of y.
25 + y2 + 4 - 4y = 81 + 4 + y2 + 4y
29 - 4y = 85 + 4y
8y = -56
y = -56 / 8 = -7
The value of y is -7.
Hence, the point on the y-axis that is equidistant from (- 5, 2) and (9, -2) is (0,-7).
Math worksheets and
visual curriculum
visual curriculum