Question

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

f(x) is the temperature change per minute, so like the rate?

Answer 2

I don't get this.

Answer 3

I think it's the slant of the line that changes, yeah.

Answer 4

if the medal starts at 25 degrees, instead of -100 degrees celsius,
you will have a new function g(x) = 89x + 25

Answer 5

to go from the old function f(x) = 89x -100 to g(x) = 89x + 25, you have to vertically shift f(x) up 125 units