What’s an equation in slope-intercept form of the line that passes through ( 6, -2) and (12, 1)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Write the factored form of this trinomial 9x^2+18x-7

14+2 (56-1) this is an arithmetic sequence