The points (9,4) and (8,1) fall on a particular line. what is its equation in point - slope form

The polynomial function of least degree with a leading coefficient of 1 is: f(x) = x3 + ax2 + bx + c

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Find the difference (8ab+a+2) - (3ab+6)