Question

Pleaseee help! :OO

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

Please help... :((( I know it's probably a really easy question but i need help bad im really dumb at this stuff.

Answer 2

y = mx + c
equation for a straight line
m = gradient
c = y intercept (ie when x = 0)

so your equation is y = 89x - 100
m = 89
c = (-100)

so neg 100 degrees is your initial starting point
if you make +25 degrees as your starting point: new eqn will be
y = mx + c
y = 89x + 25

gradient wont change, c value will
on a graph it would look something like below (really rough drawing)

Answer 3

as you can see, the new line has shifted UPWARDS
and its moved by :

Answer 4

is that all making sense @barbieeebaby ?

Answer 5

oh my god you're amazing thank-you so much! I really appreciate your straight forward answer. and yeah, it all really helped! I'll try your method on the other problems! thanks sooo much again! :))

Answer 6

nah all good hey, happy to help ;D
good luck with the rest

Answer 7

Okay! Thanks! :DDD