Which graph represents this equation?

-3x + 4y = -12

A.
A graph is a line that extends from second quadrant to fourth quadrant through left parenthesis negative 4, 0 right parenthesis, and left parenthesis 0, negative 3 right parenthesis.
B.
A graph is a line that extends from second quadrant to fourth quadrant through left parenthesis 0, 3 right parenthesis, and left parenthesis 4, 0 right parenthesis.
C.
A graph is a line that extends from third quadrant to first quadrant through left parenthesis 0, negative 3 right parenthesis, and left parenthesis 4, 0 right parenthesis.
D.
A graph is a line that extends from third quadrant to first quadrant through left parenthesis negative 4, 0 right parenthesis, and left parenthesis 0, 3 right parenthesis.

1 answer

To determine which graph represents the equation \(-3x + 4y = -12\), we can rewrite it in slope-intercept form (y = mx + b) or find the intercepts.

  1. Find the y-intercept (when \(x = 0\)): \[ -3(0) + 4y = -12 \implies 4y = -12 \implies y = -3 \] So the y-intercept is \((0, -3)\).

  2. Find the x-intercept (when \(y = 0\)): \[ -3x + 4(0) = -12 \implies -3x = -12 \implies x = 4 \] So the x-intercept is \((4, 0)\).

Now we have two points: \((0, -3)\) and \((4, 0)\).

Next, we can analyze the options:

  • Option A: Points \((-4, 0)\) and \((0, -3)\) - this does not match our intercepts.
  • Option B: Points \((0, 3)\) and \((4, 0)\) - this does not match, as the y-intercept is \(-3\), not \(3\).
  • Option C: Points \((0, -3)\) and \((4, 0)\) - this matches perfectly with our intercepts.
  • Option D: Points \((-4, 0)\) and \((0, 3)\) - this does not match.

Based on the analysis, the correct answer is:

C. A graph is a line that extends from third quadrant to first quadrant through left parenthesis 0, negative 3 right parenthesis, and left parenthesis 4, 0 right parenthesis.