So use the point slope formula: y-y1=m(x-x1)
substitute y1 and x1 with the points and m with the slope: y-(-4)=2(x-3)
This is Point-slope form.
you can go on if you want: y+4=2x+6(I multiplied 2 by x and 3)
subtract 4 from both sides: y=2x+2
This is slope-intercept form.