# Find the Linear Function f(1)=-1 , f(1)=2

,
, which means is a point on the line. , which means is a point on the line, too.
Find the slope of the line between and using , which is the change of over the change of .
Slope is equal to the change in over the change in , or rise over run.
The change in is equal to the difference in x-coordinates (also called run), and the change in is equal to the difference in y-coordinates (also called rise).
Substitute in the values of and into the equation to find the slope.
Simplify.
Multiply by .
Subtract from .
The expression contains a division by The expression is undefined.
Undefined
Undefined
Undefined
The slope of the line is undefined, which means that it is perpendicular to the x-axis at .
The final answer is the equation in slope-intercept form.
Replace by .
Find the Linear Function f(1)=-1 , f(1)=2