Given:f(x)7 a. Find the slope of the secant line between zi=-20 and Xy =-5 b. Find the slope of the tangent line 11 c, Find the equation of tangent line ata,.-11 2 Given fa)x+ a Find the slope of the secant line between x1 andx 3 b. Find tho slope of the tangunt line xo 2 c Find the equation of the tangent line at z2