#
SAT Question of The Day June 27th 2013

###

### In the quadratic equation above, is a constant. The graph of the equation in the contains the points and. What is the value of ?

### A.

### B.

### C.

### D.

### E.

### Well – this is a nice question as you are actually given too much information.

### We have the equation that correlates between X values and Y values.

### This relation is quadratic. We are missing the value of a number that is replaced by the letter C.

### It is clear that if the relation between X and Y is true then C must assumes a certain value.

### The graph of the equation passes through 6,0 that implies that when X=6 Y=0

### 0=6^2-4*6+C or 0=36-24+C

### That in turn means C=-12

### You could have come to the same conclusion using the other point – however – if you don’t like to work hard try to avoid negative numbers.

### 52% out of 143,000 got it right.

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