Which sentence demonstrates an error in parallel structure?

Idk if it's just me but I can't see any sentences so I can't help. Try reposting with a picture or just say what the answer choices are.

Step-by-step explanation:

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

other answer is correct. i had used the radius of the radius somehow. a website: