Idon't know how to graph this reflection

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

The function below is written in vertex form or intercept form. rewrite them in standard form and show your work. y = 5(x+3)^2-4

Me because i don't understand how to do it.: )