Here is the link to the playlist of videos that explain all of the math questions in the 2018 PSAT Wednesday test that was conducted on the 10th of October: **2018 PSAT Wednesday Test Video Explanations**.

## SAT math practice question: Properties of parabolas

Try the following SAT math question (No Calculator) that tests your understanding of the graph of parabolas in the coordinate plane.

$$ y = (x-r)(x-s)$$

The equation above represents the graph of a parabola in the $xy-$plane, where $r$ and $s$ are constants, and $r \neq s$. Which of the following represents the $x-$coordinate of the vertex of the parabola?

- $\quad \dfrac{r-s}{2}$
- $\quad \dfrac{r+s}{2}$
- $\quad r-s$
- $\quad r+s$

## 2018 October SAT Test: Video explanations

Here is the link to the playlist of videos that explain all of the math questions in the 2018 October SAT Question and Answer Service test. The playlists are separated by sections. Section 3 of the math section does not the allow use of calculator, whereas the calculator is permitted in Section 4 of the math section.

## SAT math practice question: Functions and factors

Try the following SAT math question (No Calculator) that tests your understanding of x-intercepts and factors of a polynomial function.

In the $xy$-coordinate plane, the three $x$-intercepts of the graph of the polynomial function $p$ are $-1, 0,$ and $2$. Which of the following is NOT a factor of $p$?

- $\quad x^2-1$
- $\quad x^2+x$
- $\quad x^2-2x$
- $\quad x^2-x-2$

## Official copy of 2018 April 10th SAT Test: State of Maine

Thanks to the State of Maine, we now have public access to official copies of 2018 April 10th School SAT day; Answers and Score Conversion.

The April 10 School Day SAT is identical to the 2018 May Sunday SAT US and 2018 May International SAT test.

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