What is 87,456 rounded to the nearest 100

Consider the line y = -3/-2 x +6. find the equation of the line that is perpendicular to this line and passes through the point (-9,-3). find the equation of the line that is parallel to this line and passes through the point (-9,-3).

For what values of b will f(x)= logbx be a decreasing function? (16 )

Which of the following is true for the relation f(x)=2x^2+1