# Hard SAT Math Question 43 — Video Explanation | 1600.now

Source: https://1600.now/hard/43

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43

The quadratic function $f$ has a vertex at $(-7,-138)$, passes through the point $(-3,-186)$, and has a $y$-intercept at $(0,c)$. The graph of $6f(x)$ has a $y$-intercept at $(0,d)$. What is the positive difference between $c$ and $d$?