Answer :
Change it to the form of y=mx+b where m = slope and b is the intercept. So to do this just move the x over, then you divide each side by -1, because the y is negative. So you finally get y=2x-4, the slope is 2!
[tex]The\ slope-intercept\ form:y=mx+b\\\\m-slope\\b-y-intercept\\\\2x-y=4\ \ \ \ /-2x\\\\-y=-2x+4\ \ \ \ \ /\cdot(-1)\\\\y=2x-4\\\\Slope:m=2[/tex]
