1. the y - intercept is when x=0 we have y=x - 1 so : y = -1
2. the y - intersept represent of wolf population the beginning of the wolf population
3. the slope is a on the equation : y=ax + b and is eguale to : a = (y2-y1) / (x2-x1) = (15 - 0) / (300 - 3)
so a = 0.05
4. In the equation of a straight line (when the equation is written as "y = mx + b"), the slopeis the number "m" that is multiplied on the x, and "b" is the y-intercept, where the line crosses they-axis. This useful form of the line equation is sensibly named the "slope-intercept form".
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