Question 1179372
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Solving the problem using formal mathematics as the other tutor did is good practice in some basic algebra, involving the slope of a line.<br>
But your understanding of math will be much stronger if, instead of plugging numbers into formulas, you UNDERSTAND what the formal mathematics is doing for you.<br>
The three points are supposed to be collinear, meaning the slope between pairs of points is the same.
The informal definition of slope is "rise over run", or change in y divided by change in x.
Arranged left to right, the three points are (-6,-4), (-3,-3), and (0,y).
From the first point to the second, the run is 3 (from -6 to -3) and the rise is 1 (from -4 to -3).
From the second point to the third, the run is also 3 (from -3 to 0); since the slopes are the same, the rise has to be 1.
A rise of 1 from y=-3 puts you at y=-2.<br>
ANSWER: at x=0, y is -2.<br>