Slope-intercept form is y=ax+b where a is the slope and b is the y-intercept. Start by getting y alone on one side. 5x-7y=-45 5x+45=7y Then divide both sides by 7 to get y alone. y= 5/7x + 45/7
well if you see any number that is could be written as a fraction is rational. square root of 9 is 3, but in this case the square root of 2 is irrational, so it is a irrational number.
