All SSAT Upper Level Math Resources
Example Questions
Example Question #1 : Graphing Functions
Refer to the above red line. A line is drawn perpendicular to that line, and with the same -intercept. Give the equation of that line in slope-intercept form.
First, we need to find the slope of the above line.
The slope of a line. given two points can be calculated using the slope formula
Set :
The slope of a line perpendicular to it has as its slope the opposite of the reciprocal of 2, which would be . Since we want this line to have the same
-intercept as the first line, which is the point
, we can substitute
and
in the slope-intercept form:
Example Question #113 : Functions And Graphs
Refer to the above diagram. If the red line passes through the point , what is the value of
?
One way to answer this is to first find the equation of the line.
The slope of a line. given two points can be calculated using the slope formula
Set :
The line has slope 3 and -intercept
, so we can substitute
in the slope-intercept form:
Now substitute 4 for and
for
and solve for
:
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All SSAT Upper Level Math Resources
