# How do you find w(-7) given w(t)=-2t+1?

Mar 15, 2018

$w \left(t\right) = - 2 t + 1$

$w \left(- 7\right) = - 2 \left(- 7\right) + 1$

$= 14 + 1$

$= 15$

#### Explanation:

When you have an equation, such as the above, $w \left(t\right)$ is saying that $w$ is a function of $t$, real numbers.

So, when asked to find $w \left(- 7\right)$, the question is asking,
At $t = - 7$, what is the value of the function $w$? Therefore, if you substitute the value $- 7$ for each t into the equation, then
$w = 15$.