Christopher has $15 in his savings account. he wants to buy a guitar. he plans to save $10 a week. prices for guitars at the music shoppe start at $130. which number line shows how long christopher will have to save to buy a guitar from the music shoppe?

So, I have this equation: 15+10x greater or equal 130, and then we just simply it to have this inequality which is x greater than or equal to 15 weeks. Finally, draw a number that has number 15 on it, next just put a close circle on it, with the arrow that moved to the right side. Hope you get it.