In a coordinate plane, if points C(2, 5), D(- 1, 2) and E(x, y) lie on line 4, which of the following would be the coordinate of point E?A. (0, 1)B. (1,1)C. (0, 2)D, (1, 4)

In a coordinate plane if points C2 5 D 1 2 and Ex y lie on line 4 which of the following would be the coordinate of point EA 0 1B 11C 0 2D 1 4 class=

Respuesta :

To answer this, we will find the equation of the line that passes through point C and D and check which option is in the same line, this will be the answer.

First, let's find the slope using th coordinates of the points C and D:

[tex]s=\frac{y_D-y_C}{x_D-x_C}=\frac{2-5}{-1-2}=\frac{-3}{-3}=1[/tex]

Now, we can use point C, for example, to right in the slope-point form:

[tex]\begin{gathered} (y-y_C)=s(x-x_C) \\ y-5=1(x-2) \\ y=x-2+5 \\ y=x+3 \end{gathered}[/tex]

With this equation, we can input values of x and check is we get the same y.

Alternative A and C have x = 0, so let's check it:

[tex]\begin{gathered} y=x+3 \\ y=0+3 \\ y=3 \end{gathered}[/tex]

I got y = 3, neither alternative have y = 3, so it isn't A nor C.

B and D have x = 1, let's check it:

[tex]\begin{gathered} y=x+3 \\ y=1+3 \\ y=4 \end{gathered}[/tex]

We got y = 4, which matches alternative D.

So, the correct alternative is D.