The equations of four lines are given. Identify which lines are parallel. Line 1: y=1/3(x+6) Line 2: y-6=3x Line 3: y=-3(x-4) Line 4: 3y + 18 = x Answers Lines 1 and 4 are parallel. Lines 1 and 3 are parallel. All four lines are parallel. Lines 2 and 3 are parallel.

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.

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