Question

What is the equation of the line containing the points:
(5,2)
(10,4)
(15,6)

Answer 1

seems to be a linear one, thus let us just pick two of those points
say (5,2) (10,4) thus \(\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
&({\color{red}{ 5}}\quad ,&{\color{blue}{ 2}})\quad &({\color{red}{ 10}}\quad ,&{\color{blue}{ 4}})
\end{array}
\\\quad \\

slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies \cfrac{{\color{blue}{ y_2}}-{\color{blue}{ y_1}}}{{\color{red}{ x_2}}-{\color{red}{ x_1}}}
\\ \quad \\

y-{\color{blue}{ y_1}}={\color{green}{ m}}(x-{\color{red}{ x_1}})\qquad \textit{plug in the values and solve for "y"}\\
\qquad \uparrow\\
\textit{point-slope form}\)

Answer 2

I still don't understand.

Answer 3

use y2-y1\x2-x1

Answer 4

Is it 2/5x?