Which equation describes an infinite solution system with the equation: y = 4x - 3

A. -2y + 8x = -6
B. 2y - 8x = -6
C. 2y - 8x = 6
D. 2y + 8x = -6

1 answer

To determine which equation describes an infinite solution system with the equation \( y = 4x - 3 \), we need to find an equation that is equivalent to it.

The given equation is in slope-intercept form ( \( y = mx + b \) ), where \( m = 4 \) and \( b = -3 \).

To compare, let's rewrite the given equation in standard form (Ax + By = C) and check each option.

Starting with \( y = 4x - 3 \):

  1. Rearranging gives: \[ -4x + y = -3 \] or, \[ 4x - y = 3 \]

Now, we will check each option to see if it represents the same line.

A. \(-2y + 8x = -6\)

Rearranging gives: \[ -2y = -8x - 6 \] \[ y = 4x + 3 \quad \text{(not equivalent)} \]

B. \(2y - 8x = -6\)

Rearranging gives: \[ 2y = 8x - 6 \] \[ y = 4x - 3 \quad \text{(equivalent, therefore infinite solutions)} \]

C. \(2y - 8x = 6\)

Rearranging gives: \[ 2y = 8x + 6 \] \[ y = 4x + 3 \quad \text{(not equivalent)} \]

D. \(2y + 8x = -6\)

Rearranging gives: \[ 2y = -8x - 6 \] \[ y = -4x - 3 \quad \text{(not equivalent)} \]

The only option that is equivalent to the original equation \( y = 4x - 3 \) is:

B. \(2y - 8x = -6\)

This system has infinite solutions.