Use the graph to answer the question.

Which is the equation of the line shown in the graph?

(-6,-6) (2,5)

(1 point)
Responses

y=118x+94
𝑦
=
11
8
𝑥
+
9
4
y is equal to 11 eighths x plus 9 fourths

y=118x+2
𝑦
=
11
8
𝑥
+
2
y is equal to 11 eighths x plus 2

y=13x+133
𝑦
=
1
3
𝑥
+
13
3
y is equal to 1 third x plus 13 thirds

y=94x+118

1 answer

To find the equation of the line that passes through the points (-6, -6) and (2, 5), we first need to determine the slope (m) of the line using the formula:

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Substituting the points (-6, -6) as \((x_1, y_1)\) and (2, 5) as \((x_2, y_2)\):

\[ m = \frac{5 - (-6)}{2 - (-6)} = \frac{5 + 6}{2 + 6} = \frac{11}{8} \]

Now that we have the slope \( m = \frac{11}{8} \), we can use the point-slope form of the equation of a line, which is:

\[ y - y_1 = m(x - x_1) \]

We'll use one of the points, say (-6, -6):

\[ y - (-6) = \frac{11}{8}(x - (-6)) \] \[ y + 6 = \frac{11}{8}(x + 6) \]

Expanding this:

  1. Distribute \(\frac{11}{8}\) across \((x + 6)\): \[ y + 6 = \frac{11}{8}x + \frac{11}{8} \times 6 \] \[ y + 6 = \frac{11}{8}x + \frac{66}{8} \] \[ y + 6 = \frac{11}{8}x + \frac{33}{4} \] (since \( \frac{66}{8} = \frac{33}{4} \))

  2. Subtract 6 from both sides: \[ y = \frac{11}{8}x + \frac{33}{4} - 6 \] \[ y = \frac{11}{8}x + \frac{33}{4} - \frac{24}{4} \] \[ y = \frac{11}{8}x + \frac{9}{4} \]

Thus, the equation of the line is:

\[ y = \frac{11}{8}x + \frac{9}{4} \]

Looking at the provided answer choices, the correct answer is:

y = \frac{11}{8}x + \frac{9}{4} (y is equal to 11 eighths x plus 9 fourths).