Slope is - 2, and (5,3) is on the line

With this information we know that in slope-intercept form that the equation will at least look like this.

y = - 2x + b.

But we have to look for b. In order to do this we are going to have to plug in (5,3) into the x and y values.

3 = - 2 (5) + b

3 = (-10) + b

13 = b

We then put this b value into the slope intercept formula.

y = - 2x + 13 < this is your final answer