All SSAT Upper Level Math Resources
Example Questions
Example Question #141 : Coordinate Geometry
What is the slope-intercept form of ?
The slope intercept form states that . In order to convert the equation to the slope intercept form, isolate on the left side:
Example Question #1441 : Gre Quantitative Reasoning
A line is defined by the following equation:
What is the slope of that line?
The equation of a line is
y=mx + b where m is the slope
Rearrange the equation to match this:
7x + 28y = 84
28y = -7x + 84
y = -(7/28)x + 84/28
y = -(1/4)x + 3
m = -1/4
Example Question #101 : Algebra
If the coordinates (3, 14) and (–5, 15) are on the same line, what is the equation of the line?
First solve for the slope of the line, m using y=mx+b
m = (y2 – y1) / (x2 – x1)
= (15 – 14) / (–5 –3)
= (1 )/( –8)
=–1/8
y = –(1/8)x + b
Now, choose one of the coordinates and solve for b:
14 = –(1/8)3 + b
14 = –3/8 + b
b = 14 + (3/8)
b = 14.375
y = –(1/8)x + 14.375
Example Question #61 : Geometry
What is the equation of a line that passes through coordinates and ?
Our first step will be to determing the slope of the line that connects the given points.
Our slope will be . Using slope-intercept form, our equation will be . Use one of the give points in this equation to solve for the y-intercept. We will use .
Now that we know the y-intercept, we can plug it back into the slope-intercept formula with the slope that we found earlier.
This is our final answer.
Example Question #1 : How To Find The Equation Of A Line
Which of the following equations does NOT represent a line?
The answer is .
A line can only be represented in the form or , for appropriate constants , , and . A graph must have an equation that can be put into one of these forms to be a line.
represents a parabola, not a line. Lines will never contain an term.
Example Question #101 : Coordinate Plane
Let y = 3x – 6.
At what point does the line above intersect the following:
(–5,6)
(–3,–3)
(0,–1)
They intersect at all points
They do not intersect
They intersect at all points
If we rearrange the second equation it is the same as the first equation. They are the same line.
Example Question #2 : Lines
A line has a slope of and passes through the point . Find the equation of the line.
In finding the equation of the line given its slope and a point through which it passes, we can use the slope-intercept form of the equation of a line:
, where is the slope of the line and is its -intercept.
Plug the given conditions into the equation to find the -intercept.
Multiply:
Subtract from each side of the equation:
Now that you have solved for , you can write out the full equation of the line:
Example Question #62 : Geometry
Find the equation of a line that has a slope of and passes through the points .
In finding the equation of the line given its slope and a point through which it passes, we can use the slope-intercept form of the equation of a line:
, where is the slope of the line and is its -intercept.
Since the problem gives us the slope of the line , we just need to use the point that is given to us to find the -intercept. Plug in known values for and taken from the given point into the equation to find the -intercept:
Multiply:
Subtract from each side of the equation:
Now that you've solved for , you can plug the given slope and the -intercept into the slope-intercept form of the equation of a line to figure out the answer:
Example Question #63 : Geometry
Find the equation of the line that has a slope of and passes through the point .
In finding the equation of the line given its slope and a point through which it passes, we can use the slope-intercept form of the equation of a line:
, where is the slope of the line and is its -intercept.
Since the problem gives us the slope of the line , we just need to use the point that is given to us to find the -intercept. Plug in known values for and taken from the given point into the equation and solve for to find the -intercept:
Multiply:
Subtract from each side of the equation:
Now, we can write the final equation by plugging in the given slope and the -intercept :
Example Question #64 : Geometry
Find the equation of the line that has a slope of and passes through the point .
In finding the equation of the line given its slope and a point through which it passes, we can use the slope-intercept form of the equation of a line:
, where is the slope of the line and is its -intercept.
Since the problem gives us the slope of the line , we just need to use the point that is given to us to find the -intercept. Plug in known values for and taken from the given point into the equation and solve for to find the -intercept:
Multiply:
Add to each side of the equation:
Now, we can write the final equation by plugging in the given slope and the -intercept :
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