How would you graph this 15x - 5y equals 30? - Answers

The first thing you need to do is get this equation to y=something, here's how you'd work that for this equation. 15x-5y=30 (subtract 15x from both sides) 5y=-15x+30 (now we're going to divide everything by 5 to get y by itself) y=-3x+6 The graph of this equation is going to be a straight line with a slope of -3 and a y-intercept of 6 * * * * * Here is a simpler way. You do not have to rewrite the equation. Just leave it as it is: 15x - 5y = 30 Step 1A: Cover up the y term so that the equation reads: 15x = 30 divide both sides by 15 so you get x = 2. Step 1B: Mark the point with coordinates x = 15, y = 0 ie (15, 0), and label it A. Step 2A: Cover up the x term so that the equation reads: -5y = 30 divide both sides by -5 so you get y = -6. Step 2B: Mark the point with coordinates x = 0, y = -6 ie (0, -6) and label it B. Step 3: Join AB and extend both ways. Step 4: Sit back and laugh at the people who rewrote the formula in the form y = something, got the slope and intercept, but don't know how that helps to graph the equation!