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Math·Algebra·Linear functions

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$d=20t$

The given equation relates the distance $d$, in inches, of an object from its starting position to the time $t$, in seconds, since the object started moving. What is the rate of change of the object’s distance from its starting position over time?

A

$20t$ inches per second

B

$20$ inches per second

C

$\frac{1}{20}$ inches per second

D

$\frac{1}{20t}$ inches per second