For the following exercises, determine whether the relation is a function
1 answer:
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Answer: (1,3)
Step-by-step explanation:
Let's solve this <u>system of equations</u> by elimination. We will multiply one or both equations such that when we combine the equations, one of the variables will completely cancel out.
Let's multiply the whole first equation by -2 to achieve this:
now becomes
Now let's add both equations
Since we got y into a form we can solve it for, lets divide both sides by -5 to isolate it.
Now that we have the value of y, we can substitute it into any equation to solve for x. Only if we have both x and y can we make an ordered pair. Let's use the second equation and substitute 3 for y.
We can now solve for x.
<em>[Adding 3 to both sides]</em>
<em /> <em>[Dividing by 2 on both sides]</em>
We now have both x and y, so we can put it in an ordered pair to answer the question.