To make an equation we need to put into a slope intercept form. The formula is Rise/run or y-y/x-x so it is -3 - 2/19-9 which is -5/10 so the slope is -1/2 so the equation right now is y=-1/2x+b then we need to find the y intercept which we can use a graphing website to find the y-intercept which is on the y-axis and it is about 10 so the equation is y=-1/2x+10. The equation and answer is y=-1/2x+10 Hope this helps!