Question

MEDAL FOR EXPLANATION !

A science experiment begins with a metal at -100° Celsius. The following function describes the temperature change per minute: f(x) = 89x - 100°. How will the graph of this function change if the metal is at 25° at the start of the experiment?

The line will shift vertically up by 125°.
The line will shift vertically up by 25°.
The line will shift vertically down by 125°.
The line will shift vertically down by 25°.

Answer 1

well -100 was our y-intercept, but now it is saying that the 25 degrees will be positive. First, in order to get -100 to 0 you add 100, then add 25.

Answer 2

But we didn't just add 25 we added 125

Answer 3

And if we add then the line will shift upwards, if we had subtracted the line would've shifted downwards

Answer 4

We were at -100 and we want to get to positive 25, what would we do? Add 125

Answer 5

So it would be the first one ?

Answer 6

yes :)

Answer 7

thank you so much & medal for you !