The equation for a straight line is y = mx+b whereas m is the slope and b is the y intercept
For example: y = 3x+9 which means that 3 is the slope and 9 is the y intercept
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In the equation m = k + 3, m is the:
2
y=mx+b, because m stands for the slope and b is the y-intercept
If necessary, rearrange the linear equation so that it is in the slope-intercept form: y = mx + c Then the gradient of the line is m.
The linear function has the form y=mx+b, which I expect you have heard of. The 'b' is the y-intercept, and the 'm' is the slope. A constant of proportionality is something you have with direct variation, which is where the line goes through (0,0). This happens when 'b' equals zero. So now the equation is just y=mx, and the constant of proportionality is 'm'.