## Algebra 1: Common Core (15th Edition)

$y=-2.44x+137$
Two points on the trend line are: $(x_1,y_1) \rightarrow (25,76)$ $(x_2,y_2) \rightarrow (43,32)$ Write an equation of the trend line. $m=\frac{y_2-y_1}{x_2-x_1}=\frac{32-76}{43-25}=2.44$ Use the point-slope form: $y-y_1=m(x-x_1)$ Plug in values: $y-76=-2.44(x-25)$ $y=-2.44x+137$