Calculate point P

on AB¯¯¯¯¯¯¯¯
such that the ratio of AP
to PB
is 1:3.

(1 point)
Responses

P(−1,−1)
upper P left parenthesis negative 1 comma negative 1 right parenthesis

P(−212,−214)
upper P left parenthesis negative Start Fraction 5 over 2 End Fraction comma negative Start Fraction 9 over 2 End Fraction right parenthesis

P(12,112)
upper P left parenthesis Start Fraction 1 over 2 End Fraction comma Start Fraction 3 over 2 End Fraction right parenthesis

P(−245,−235)
upper P left parenthesis negative Start Fraction 14 over 5 End Fraction comma negative Start Fraction 13 over 5 End Fraction right parenthesis

1 answer

To find point P on line segment AB such that the ratio of \( AP \) to \( PB \) is \( 1:3 \), we first need to determine the coordinates of points A and B.

Let’s assume point A has coordinates \((x_1, y_1)\) and point B has coordinates \((x_2, y_2)\).

We can express point P as a weighted average of points A and B based on the given ratio. If the ratio \( AP:PB \) is \( 1:3 \), it implies that \( AP \) is \(\frac{1}{1+3} = \frac{1}{4}\) of the way from A to B, and \( PB \) is \(\frac{3}{4}\) of the way from A to B.

Using the section formula, the coordinates of P can be calculated as:

\[ P = \left(\frac{mx_2 + nx_1}{m+n}, \frac{my_2 + ny_1}{m+n}\right) \]

where \( m = 3 \) (the portion to B) and \( n = 1 \) (the portion to A).

Without specific coordinates for points A and B, we cannot complete the calculation. However, if we assume general points for A and B, we can derive point P.

For example, let's choose points A and B:

  • A(0, 0)
  • B(4, 4)

Then, applying the section formula:

  1. \( P_x = \frac{34 + 10}{3 + 1} = \frac{12 + 0}{4} = 3 \)
  2. \( P_y = \frac{34 + 10}{3 + 1} = \frac{12 + 0}{4} = 3 \)

Thus, \( P \) would be (3, 3).

However, since we need the answer among the provided options, and assuming any of them could be derived from specific points A and B, you should check which coordinates yield the desired ratio across varying assumptions about A and B.

The options provided, without the exact coordinates for A and B, leave us to deduce from the plausible choices:

  1. \( P(-1, -1) \)
  2. \( P\left(-\frac{5}{2}, -\frac{9}{2}\right) \)
  3. \( P\left(\frac{1}{2}, \frac{3}{2}\right) \)
  4. \( P\left(-\frac{14}{5}, -\frac{13}{5}\right) \)

Without more information, we can't definitively choose which point corresponds to the requested ratio, so additional context about the locations of points A and B would clarify the required answer from the list you've given.