Do the equations y−1.5=5(x+6.5) and y+8.5=5(x+8.5) represent the same line?

Yes, because they both convert to y=5x+34 in slope-intercept form.

No, because they both convert to different equations in slope-intercept form.

Yes, because they both convert to y=5x+22 in slope-intercept form.

Yes, because they both convert to y=
5
1

x+22 in slope-intercept form.

1 answer

To determine if the equations \( y - 1.5 = 5(x + 6.5) \) and \( y + 8.5 = 5(x + 8.5) \) represent the same line, we need to convert both equations into slope-intercept form ( \( y = mx + b \) ).

Converting the first equation:

  1. Start with \( y - 1.5 = 5(x + 6.5) \).
  2. Distribute the 5: \[ y - 1.5 = 5x + 32.5 \]
  3. Add 1.5 to both sides: \[ y = 5x + 34 \]

Converting the second equation:

  1. Start with \( y + 8.5 = 5(x + 8.5) \).
  2. Distribute the 5: \[ y + 8.5 = 5x + 42.5 \]
  3. Subtract 8.5 from both sides: \[ y = 5x + 34 \]

Both equations simplify to \( y = 5x + 34 \).

Therefore, they represent the same line.

The correct conclusion is:

Yes, because they both convert to \( y = 5x + 34 \) in slope-intercept form.