To plot the equation y=x2+2x+1, we will create a table of values and then draw the corresponding points on a graph.
First, let’s analyze the equation y=x2+2x+1. This is a quadratic equation, which means its graph will be a parabola. The general form of a quadratic equation is given by:
y=ax2+bx+c,where in this case, we have a=1, b=2, and c=1.
Next, we will create a table of values to assist in plotting the graph. We will select a range of x values that include both negative and positive numbers and calculate the corresponding y values. Here’s the table:
\begin{array}{c|c} x & y = x^2 + 2x + 1 \ \hline -3 & (-3)^2 + 2(-3) + 1 = 9 - 6 + 1 = 4 \ -2 & (-2)^2 + 2(-2) + 1 = 4 - 4 + 1 = 1 \ -1 & (-1)^2 + 2(-1) + 1 = 1 - 2 + 1 = 0 \ 0 & (0)^2 + 2(0) + 1 = 0 + 0 + 1 = 1 \ 1 & (1)^2 + 2(1) + 1 = 1 + 2 + 1 = 4 \ 2 & (2)^2 + 2(2) + 1 = 4 + 4 + 1 = 9 \ \end{array}
Now, we can plot these points on a graph with an x-axis and a y-axis. The points to plot are as follows: (−3,4), (−2,1), (−1,0), (0,1), (1,4), and (2,9).
Once you have plotted these points, draw a smooth curve connecting them. You will observe that the graph forms a U-shaped parabola that opens upwards. The vertex of this parabola, which represents its lowest point, is located at the coordinates (−1,0). This can be confirmed by rewriting the equation in vertex form as follows:
y=(x+1)2.This shows that the vertex occurs at x=−1, confirming that the lowest point of the parabola is indeed at (−1,0).
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