use quadratic regression to find the equation of the parabola going through these three points (-1,23)(1,-5)(3,-57)

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

Answer this question! 30 points and brainliest!

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.