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Poohpooh8548
19.07.2019 •
Mathematics
How do i write a quadratic equation from a parabola and a chart
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Ответ:
2. If the parabola is upside down remember to add in a negative in front of a.
3. Substitute the (x,y) coordinates of the vertex in the vertex form equation remember h=x and k=y.
4. Now, substitute any point (x,y) from the table into the x and f (x) of the vertex form, f (x)=y.
5. Solve for a.
6. Goto #3 and sub in the a value from step #5.
7. You are done and have a equation in vertex form.
To change to standard just distribute (a) value into the equation (distribution property) and simplify (add or subtract like terms).
Ответ:
f(-4) = -2(-4)+3
f(-4) = 8+3
f(-4) = 11
the answer is 11