Jacinda draws triangle A(-5,1)B(-3,4)C(-4,-2) and translates it along the coordinate grid to produce triangle A'(0,2)B'(2,5)C'(1,-1). Then she determines the functions f (x) = x + h and g (y) = y + k that describe the translation. What are the values of h and k in these functions?

The value of h is ___ and the value of k is___.

1 answer

To find the values of \( h \) and \( k \) in the functions \( f(x) = x + h \) and \( g(y) = y + k \), we need to determine the translation that occurs between the original triangle and the translated triangle.

  1. Identify the coordinates of the original triangle:

    • A(-5, 1)
    • B(-3, 4)
    • C(-4, -2)
  2. Identify the coordinates of the translated triangle:

    • A'(0, 2)
    • B'(2, 5)
    • C'(1, -1)
  3. Calculate the translation by comparing the coordinates:

    Let's start with point A to determine \( h \) and \( k \):

    • Original point A: (-5, 1)
    • Translated point A': (0, 2)

    For the x-coordinates: \[ 0 = -5 + h \implies h = 0 + 5 = 5 \]

    For the y-coordinates: \[ 2 = 1 + k \implies k = 2 - 1 = 1 \]

  4. Confirm with another point (like B or C):

    • Original point B: (-3, 4)
    • Translated point B': (2, 5)

    For the x-coordinates: \[ 2 = -3 + h \implies h = 2 + 3 = 5 \] For the y-coordinates: \[ 5 = 4 + k \implies k = 5 - 4 = 1 \]

    • Original point C: (-4, -2)
    • Translated point C': (1, -1)

    For the x-coordinates: \[ 1 = -4 + h \implies h = 1 + 4 = 5 \] For the y-coordinates: \[ -1 = -2 + k \implies k = -1 + 2 = 1 \]

Since the calculations for \( h \) and \( k \) are consistent across all three points, we conclude that:

  • The value of \( h \) is 5.
  • The value of \( k \) is 1.

Thus, the final answers are: \[ \text{The value of } h \text{ is } 5 \text{ and the value of } k \text{ is } 1. \]