Question

Tony observed the solution to a pair of linear equations graphed in the coordinate plane to be(-6,-5). Which method can be used to verify that (-6,-5) is the correct solution?

Answer 1

Given:

the solution to a pair of linear equations graphed in the coordinate plane to be(-6,-5).

We will find which option is correct.

To verify that (-6,-5) is the correct solution

So, the first two options are wrong because the substitution is wrong

The third option is wrong because when the substitution with x = -6 into the equation on the right-side the answer will be as follows:

`\begin{gathered} y=(-1)/(2)x-2 \\ -5=(-1)/(2)(-6)-2 \\ -5=3-2 \\ -5=1\rightarrow\text{Wrong} \end{gathered}`

So, the answer will be option 4

we must substitute with x = -6 and y = -5