Rewrite the equation 3x+y=7

in slope-intercept form to select the statement that correctly describes the system of equations

Statement #1: The system of equations has no solutions because the graphs of the two equations are parallel lines.

Statement #2: The system of equations has an infinite number of solutions because the graphs of the two equations occupy the same line.

(2 points)
The equation 3x+y=7
is y=

in slope intercept form, which means that statement #
describes the system of equations.

2 answers

To rewrite the equation \(3x + y = 7\) in slope-intercept form (\(y = mx + b\)), we need to solve for \(y\).

Starting with the original equation:

\[ 3x + y = 7 \]

Subtract \(3x\) from both sides:

\[ y = -3x + 7 \]

Now, in slope-intercept form, the equation is:

\[ y = -3x + 7 \]

This tells us that the slope (\(m\)) is \(-3\) and the y-intercept (\(b\)) is \(7\).

Now, you need a second equation to analyze the system of equations. Assuming you have a second equation, you would compare the slopes:

  1. If the slopes are different, the system has one solution (the lines intersect).
  2. If the slopes are the same but the y-intercepts are different, the system has no solutions (the lines are parallel).
  3. If the slopes and y-intercepts are the same, the system has infinitely many solutions (the lines are the same).

Since you only provided one equation, we can't definitively choose Statement #1 or Statement #2 without additional context regarding the second equation.

However, based on the transformed equation \(y = -3x + 7\):

  • If the second line is not parallel (has a different slope or is the same line), we cannot confirm either statement.

In conclusion:

The equation \(3x + y = 7\) is \(y = -3x + 7\) in slope-intercept form, which means that without additional information about a second equation, we cannot select either statement with certainty.

which statement is better?