Given the directrix of y = −1 and focus of (0, 3), which is the equation of the parabola? y = one eighthx2 − 1 y = −one eighthx2 + 1 y = one eighthx2 + 1 y = −one eighthx2 − 1

Step-by-step explanation:

we know that

The standard form of a quadratic equation is

where

(h,k) is the vertex

(h, k+p) is the focus

y=k-p is the directrix

we have

focus (0,3)

so

> equation A

directrix y=-1

so

---> equation B

Adds equation A and equation B

Find the value of p

substitute the values in the equation

therefore

y = one eighthx2 + 1

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )