What the answer of 6sin^2(x) + 2cos^2(x)=5

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab