#### Answer

$y=5+10x$

#### Work Step by Step

Beginning at 15 when x is 1, y increases by 10 each time x increases by 1.
To write a formula, find the value when x is 0. SInce y increases when x increases, y will decrease when x decreases. When x is 0, y is 5.
$y=5+10x$
To extend the table, add 1 to x and 10 to y in each new row.
$\underline{x}\ \ \ \ \underline{\ y\ }$
$1\ \ \ \ \ 15$
$2\ \ \ \ \ 25$
$3\ \ \ \ \ 35$
$4\ \ \ \ \ 45$
$5\ \ \ \ \ 55$
$6\ \ \ \ \ 65$
$7\ \ \ \ \ 75$