Jessica is asked to write a quadratic equation to represent a function that goes through the point (8, –11) and has a vertex at
(6, –3). Her work is shown below. –11 = a(8 – 6)2 – 3 –11 = a(2)2 – 3 –11 = 4a – 3 –8 = 4a a = –2 After Jessica gets stuck, she asks Sally to help her finish the problem. Sally states that Jessica needs to write the quadratic equation using the value she found for a, –2, and the point (8, –11). Evaluate Jessica’s work and Sally’s review to determine which statement is true. 1. Jessica did not solve for the correct value of a, but Sally’s review is correct. 2. Jessica did not solve for the correct value of a, and Sally’s review is incorrect. 3. Jessica solved for the correct value of a, but Sally’s review was incorrect. 4. Both Jessica’s work and Sally’s review are correct. The equation is f(x) = –2(x – 8)2 – 11.
Jessica’s work is correct and Sally’s review is incorrect
Step-by-step explanation:
I'm just assume it's a vertical parabola we know that The equation of a vertical parabola in vertex for is equal to where (h,k) is the vertex In this problem we have point substitute To find the equation using the value of a and the vertex point so therefore
Jessica’s work is correct and Sally’s review is incorrect
The percentage of apartments rented for less than $600 is given by the sum of all of the apartments in the 300 to 400, 400 to 500 and 500 to 600 intervals divided by the total number of apartments sampled (250).
I would go with the second statement is true because if all of the other ones mentioned in the problem had something that would not work either the one before or after would make the statement false excepted for statement two
