What is the initial value of the function represented by this graph?

a coordinate grid is shown with x and y axes labeled from 0 to 7 at increments of 1. a straight line joins the ordered pair 0, 2 with the ordered pair 7, 5.
0
1
2
5

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

Find the solution(s) to x^2-14+49=0

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?