+4 hi i was wondering how you graph a linear function
i.e.
d(x)=-1/2x-3
+118658 hi i was wondering how you graph a linear function
i.e.
d(x)=-1/2x-3
d is rarely used in a spot like this - I suppose it can be but f(x) or g(x) or just plane y would be more normal.
y=-1/2x-3
The linear equation is of the form y=mx+b
so
m=-1/2 and b=-3
b is the y intercept, it is a point so you can plot it straight away. It is where the line cuts the y axis.
m is the gradient which is the slope.
\(m=\frac{rise}{run}=\frac{-1}{2}\)
m is negative so the line must head to the TOP LEFT corner of the graph.
start at the y intecept go up 1 and left 2 places, this means that the second point will be (-2,-2)
