Find the quadratic function in standard form.

Question

Given the points (30,6), (60,7), (100,4). Plug into y=ax^2+bx+c then graph.

Answer 1

To show you how to do it, here's a solution to a similar problem: http://www.wyzant.com/resources/answers/30717/find_an_equation_in_standard_form_of_the_line_containing_given_points_1_7_2_2_4_35

 

Which, of course, was a question YOU posted.

 

Or you could use polynomial regression on your graphing calculator to get:

y = -0.00154761904761905 x^2 + 0.172619047619048 x + 2.21428571428572