20 points! could you answer i need to get 100% or i will fail answer in 5 or 10 minutes graph of a proportional relationship contains the point (4, 20). what is the constant of proportionality?

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0