Functions written in slope-intercept form follow a specific format.
f(x)=mx+ b
In this form, m represents the slope of the line and b represents the y-intercept.
Below we highlight the slope m and y-intercept b.
f(x)=-2x - 3 ⇔ f(x)=-2x+( -3)
The slope is -2. The y-intercept is -3, so the graph crosses the y-axis at the point (0, -3).
Graphing the Equation
A slope of -2 means that for every 1 unit we move in the positive horizontal direction, we move 3 units in the negative vertical direction.
m=-2/1 ⇔ rise/run=-2/1
To graph the equation, plot the y-intercept and then use the slope to find another point on the line.
