# Hard SAT Math Question 24 — Video Explanation | 1600.now

Source: https://1600.now/hard/24

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24

The function $g$ is defined by $g(x) = a^x + b$, where $a$ and $b$ are constants. In the $xy$-plane, the graph of $g$ crosses the $x$-axis at $(5, r-22)$, and the $y$-axis at $(0, -11r)$, where $r$ is a constant. What is the value of $a - b$?