Evaluate 25 - 3x for x = 0, 1, 2, 3, and 4. Which of the following correctly describes the pattern?

As x increases by 1, the expression 25 - 3x increases by 3.

As x increases by 1, the expression 25 - 3x decreases by 3.

As x increases by 3, the expression 25 - 3x increases by 1.

As x increases by 3, the expression 25 - 3x decreases by 1.

Question

Evaluate 25 - 3x for x = 0, 1, 2, 3, and 4. Which of the following correctly describes the pattern?

As x increases by 1, the expression 25 - 3x  increases by 3.

 As x increases by 1, the expression 25 - 3x  decreases by 3.

 As x increases by 3, the expression 25 - 3x  increases by 1.

 As x increases by 3, the expression 25 - 3x decreases by 1.

mathstudent55 · Answer

Take the expression 25 - 3x
Now replace x with the first number given, 0
You get 
25 - 3 * 0
Now can you evaluate this expression?

imnotgoodatmath · Answer

@iGreen

igreen · Answer

$25 - 3x$

Plug in 0:

$25 - 3(0)$

Any number multiplied by 0 is 0.

So:

$25 - 0$

$25$

igreen · Answer

$25 - 3x$

Plug in 1:

$25 - 3(1)$

$25 - 3$

$22$

igreen · Answer

As you see, we keep increasing $x$ by 1, and the solution is being subtracted by 3.

So your answer is B.

imnotgoodatmath · Answer

ok thanks!