When looking at a table of values, how do you identify the y-intercept of a quadratic function?

Find the row where x=0, the corresponding y value is the y-intercept.

Why is it important to find at least three points (including intercepts) when graphing a quadratic function from a table?

Three points are needed to accurately sketch the U-shape of the parabola.

Grade 9th Grade · Math · 45 min

I can graph a quadratic function from a table of values.

Kayla Jones · 2:50

Graphing Quadratics from Tables

3 key concepts

1
The x-intercepts of a quadratic function can be found in a table of values by looking for when the y-value is 0.
2
The y-intercept of a quadratic function can be found in a table of values by looking for when the x-value is 0.
3
To graph a quadratic from a table, plot the x-intercepts and y-intercept, then sketch a U-shaped graph through the points.

11 questions · Multiple choice & Short answer

Quick comprehension check

“Given the table below, identify the x and y intercepts, then sketch the graph. x | -4 | -3 | -2 | -1 | 0 y | 0 | -3 | -4 | -3 | 0”

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