Question

How do I do this?

Penny’s function has an output that is four more than three times the input. John’s function expressed in slope-intercept form is y = 3.5x – 4.
Which of the following is true?
A. As the input increases, John’s function is increasing and Penny’s function is decreasing.
B. As the input increases, John’s function is decreasing and Penny’s function is increasing.
C. John’s function has a greater rate of change, because 3.5 > 3.
D. Penny’s function has a greater rate of change, because 4 > 3.5.

Answer 1

@satellite73 @jim_thompson5910 @iambatman

Answer 2

i got my answer
you?

Answer 3

IDK How to do it.

Answer 4

Penny’s function has an output that is four more than three times the input.
\[f(x)=3x+4\] might be a good representation of that function

Answer 5

or if you prefer
\[y=3x+4\] a line with slope \(3\) and \(y\) intercept \(4\)

Answer 6

compare with
\[ y = 3.5x – 4\] a line with slope \(3.5\) hmmm

Answer 7

D or C?

Answer 8

D Penny’s function has a greater rate of change, because 4 > 3.5.
is the slope of \(3x+4\) equal to \(3\) ??

Answer 9

i guess i mean
the slope of \(y=3x+4\) IS equal to 3, not 4

Answer 10

so D cannot be correct

Answer 11

therefore go with C
the other two are just silly

Answer 12

put out the dog, bring in the cat
https://www.youtube.com/watch?v=-cHB3Rbz1OI

Answer 13

I see. :) Thanks! I might have a couple of more I need explained. :)

Answer 14

k