top of page
00:00 / 00:15
Y-Intercept
After putting your quadratic equation in standard formula, you need to identify your y-intercept.
y-intercept: is where the line crosses the y-axis. (your x-value will be 0)
​
To solve for the y-intercept, you need to substitute 0 in for x.
00:00 / 00:14
Let's try a few examples on how to identify the y-intercept of a standard equation
00:00 / 01:20
Standard Equation
Substitution
Y-Intercept
Substitute 0 in for every x in the equation ( 5 and 4)
Substitute 0 in for every x in the equation ( -3 and -2)
Substitute 0 in for every x in the equation ( 10 and 4)
y-intercept: 1
y-intercept: 4
y-intercept: -3
* Notice that the c-value of the standard form equation is the y-intercept
This will be true for every standard equation.
We can see that our c-value for the equation above is -3. We can also see our y-intercept is at (0,-3).
00:00 / 00:10
00:00 / 00:17
Below is a helpful video on how to find the y-intercept.
00:00 / 00:05
00:00 / 00:12
Let's try an activity on Desmos!
*Once you finish the Desmos activity close out of the Desmos window
Link Code:
​YFM2GX
00:00 / 00:15
Here is another activity to try.
00:00 / 00:10
Now that you have gone through the y-intercept page, let's see what you have retained. Take a click on the assessment button to see what you have learned.
00:00 / 00:30
If you feel that you have an understanding on how to identify and plot the y-intercept please move on to the next section. If not please review this page or look at the previous page.
bottom of page