## Intermediate Algebra (12th Edition)

$y-\text{intercept is } 7 \text{ or } (0,7)$
$\bf{\text{Solution Outline:}}$ Use the definition of $y-$intercept (the value of $y$ or $f(x)$ when $x$ is $0$), to find the $y-$intercept of $f(x)=2x+7 .$ $\bf{\text{Solution Details:}}$ Substituting $x=0 ,$ in the given function, then \begin{array}{l}\require{cancel} f(0)=2(0)+7 \\\\ f(0)=0+7 \\\\ f(0)=7 .\end{array} Hence the $y-\text{intercept is } 7 \text{ or } (0,7) .$