What is the solution to this system of equations? x= 12 - y
2x + 3y= 29

x = 8, y=4
x= 6, y= 6
x=7, y=
x= 9, y=3

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.