Help please!! i need to get my grade up by saturday

Linet passes through (4.5) and is perpendicular to the line shown on the condirate grid.what is the equation of line t in standard form?

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)