help with slope intercept
Find the equation of a line given the point and slope below. Arrange your answer in the form y = mx + b, where b is the constant.
m = -1
y = mx + c
The line equation is a formula for calculating every coordinate that lies on the line. So all we have to do is plug the x and y values given in the coordinate into the equation, as well as the gradient (m).
therefore c = 4
so 5 = (-1)*(-1) + c
so the equation for the line in question is y = -1*x + 4. All we have done is substituted in known values for x and y that satisfy the equation, and used the given gradient to complete it.