ACT Math : How to find x or y intercept
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Example Question #12 : X And Y Intercept
What is the largest x-intercept of 
There are no x intercepts for this equation.
To find the x-intercepts of an equation, you can just set the y value of the equation equal to zero. Thus you get, for our data:
Now, you can divide everything by 
Luckily, this is an easy equation to factor:
Based on this, you know that the two intercepts must be where 
Example Question #13 : X And Y Intercept
What is the sum of the x-intercepts of 
To find the x-intercepts of an equation, you can set its y value equal to zero. Thus, you get for our equation:
Now, factor out all common factors:
From this, you can further factor:
Thus, the x-intercepts of our equation are 
Example Question #11 : How To Find X Or Y Intercept
What is the 
The y-intercept is the constant at the end of the equation. Thus for our equation the y-intercept is 7
Example Question #13 : How To Find X Or Y Intercept
What is the 
Give your answer as an ordered pair.
The x-intercept is the value of the linear equation with y = 0 (this means the line will be on the x-axis when y is zero).
Thus we plug 0 in for y and solve for x.
Now put it in an ordered pair, remember y = 0:
Example Question #14 : How To Find X Or Y Intercept
What is the 
To find the 
To do this, plug in zero for either variable and then solve for the other.
this yields:
Example Question #13 : X And Y Intercept
What is the 
To find the 
Next, set 
Now put these two sets of points into two ordered pairs:
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