What is the value of $c$ if the lines with equations $y = 8x + 2$ and $y = (2c)x - 4$ are parallel?
I know that parallel lines have the same slope, so the coefficients of $x$ must be equal in both equations. Therefore, I can write $8 = 2c$ and solve for $c$ by dividing both sides by 2. I get $c = 4$ as the value of $c$ that makes the lines parallel.

