How to write (-8,-4) and (-6,-1) in slope- intercept form

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

What is the standard form of -5x^2+2x^4-11+x^3+3x

Graph the equation by plotting point x=2