Chapter 2 - Functions and Their Graphs - 2.2 The Graph of a Function - 2.2 Assess Your Understanding - Page 64: 10

$(a)$

There can only be at most $1$ $y$-intercept, at $x=0$ for which the function has a unique value or is undefined. However, a function may have two or more $x$-intercepts (e.g., $f(x)=x^2-4$ has $x$-intercepts at $2$ and $-2$) . Hence, the answer is $(a)$.