Fatou marks the points (3,−5) and (−2,−7) on the coordinate plane. Then, she finds the distance between them. What is this distance rounded up to the nearest tenth of a unit?(1 point)

1 answer

To find the distance between the points \( (3, -5) \) and \( (-2, -7) \), we can use the distance formula:

\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]

Here, we have:

  • \( (x_1, y_1) = (3, -5) \)
  • \( (x_2, y_2) = (-2, -7) \)

Now, substituting the coordinates into the distance formula:

\[ d = \sqrt{((-2) - 3)^2 + ((-7) - (-5))^2} \]

This simplifies to:

\[ d = \sqrt{(-5)^2 + (-2)^2} \]

Calculating each term:

\[ (-5)^2 = 25, \quad (-2)^2 = 4 \]

Now add these values:

\[ d = \sqrt{25 + 4} = \sqrt{29} \]

Next, we calculate \( \sqrt{29} \). The approximate value is:

\[ \sqrt{29} \approx 5.385 \]

Finally, rounding \( 5.385 \) up to the nearest tenth:

\[ \text{Rounded distance} \approx 5.4 \]

Therefore, the distance between the two points, rounded to the nearest tenth, is

\[ \boxed{5.4} \]