This value is in the positive quadrant meaning that all values remain positive. To answer this problem you must have an understanding of trig ratios being that tangent is opposite/adjacent. When you plot the points and draw a triangle using the origin of the point, you find that the adjacent value is 5 and opposite value is 15
Equation of the line is y=mx+b the line passing through point (1;-2) so x=1 y=-2 m=-0.5 so put all these values in equetion and found value of b -2=-0.5*1+b -2=-0.5+b b=-1.5 so equation of the line is y=-0.5x-1.5 Answer: equation of the line is y=-0.5x-1.5