All Intermediate Geometry Resources
Example Questions
Example Question #11 : How To Find X Or Y Intercept
Find the y-intercept for the line
.
To find the y-intercept, plug in 0 for x, since the y-axis is where x = 0.
subtract 24 from both sides
divide by -3
The y-intercept is
Â
Â
Example Question #12 : How To Find X Or Y Intercept
Find the x-intercept for the line
.
To find the x-intercept, plug in 0 for y, since the x-axis is where y = 0
subtract 5 from both sides
multiply both sides by -3
The x-intercept is
Example Question #12 : How To Find X Or Y Intercept
What is the y intercept of the line :
Here all we have to remember is that when given a linear equation to find the y-intercept, or where the line crosses the y-axis, we just need to set x=0 and solve for y. This solution is shown below:
Example Question #12 : X And Y Intercept
A rocket is fired that follows the below parabolic path where h(t) represents the height (in feet) over time (in seconds). How much time did the rocket spend in the air?Â
0 seconds
256 seconds
8 seconds
16 seconds
16 seconds
To solve, you must find the zeros or x-intercepts for the function h(t).Â
To find x-intercepts, we must plug in 0 for h(t).Â
Factor to solve - divide by 16t.Â
Set both parts equat to zero.Â
  Â
The answer is t=16 because when t=0, that is when the rocket is first being fired from the ground, the rocket then returns to the ground after having spent 16 seconds in the air.Â
Â
Example Question #14 : How To Find X Or Y Intercept
Find the y-intercept(s) for the circle given by the equation below:Â
To find the y-intercept for any equation, plug in 0 for x in the original equation.Â
Simplify
Subtract 25 from both sides
Take the square root of both sides
Subtract 2 from both sides to get the y-intercept.Â
This circle has one y-intercept.Â
It is possible for a circle to have one y-intercept, two y-intercepts or no y-intercepts.Â
Example Question #18 : X And Y Intercept
Find the x-intercept(s) for the circle defined by
The x-intercepts occur when y is equal to zero. So to figure out the x-intercepts, plug in 0 for y:
subtract 9 from both sides
take the square root of both sides
there are 2 possibilities here since
and also
One solution: subtract 1 from both sides
Â
The other solution: subtract 1 from both sides
Example Question #241 : Coordinate Geometry
Find the y-intercept(s) for the equation
The y-intercept occurs when x is 0, so plug in 0 for x:
Â
Example Question #20 : X And Y Intercept
Find the x- and y-intercepts for the equation
To find the x-intercept, plug in 0 for y:
subtract 5 from both sides
divide both sides by -2
since x is 2.5 and y is 0, this point is
Â
To find the y-intercept, plug in 0 for x:
This gives the point
Example Question #21 : X And Y Intercept
Find the -intercept for the lineÂ
.
Start by putting the equation into  form, whereÂ
 is the slope, andÂ
 is the y-intercept.
By definition, the x-intercept is where the line crosses the x-axis. As such, the y-coordinate of this point must be .Â
Plug  in forÂ
 in the equation for this line.
Now, solve for .
The x-intercept is found at .
Example Question #22 : X And Y Intercept
Find the x-intercept for the line .
Start by putting the equation into  form, whereÂ
 is the slope, andÂ
 is the y-intercept.
By definition, the x-intercept is where the line crosses the x-axis. As such, the y-coordinate of this point must be .Â
Plug  in forÂ
 in the equation for this line.
Now, solve for .
The x-intercept is found at .
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