Question

WILL MEDAL AND FAN!!!!
Jose received $30 for his birthday and put it in his piggy bank. Each week, he puts 4 more dollars in his bank. The amount of money in dollars D in his bank is given by D = 4w + 30 where w is the number of weeks he has saved 4 dollars. His sister Marisol helped him find how much money he will have after 4, 15, 20, and 36 weeks. This table shows her results.
http://s15.postimg.org/qzgfiqknv/More_Math_Junk.png

What is the rate of change using Marisol's values for D and w and is this a linear or non-linear model?

A. The rate of change varies. It is a non-linear model.


B. The rate of change varies. It is a linear model.


C. The rate of change is 4. It is a linear model.


D. The rate of change is 1/4. It is a linear model.

Answer 1

What did u get ?

Answer 2

I have no Idea but I think it may be D.

Answer 3

@magicremix123 a little extra help please? No offense Rushwr. :)

Answer 4

it is wrong !

Answer 5

i thank its A

Answer 6

rate of change = the difference between the money divided by the difference between the weeks.
I got D

Answer 7

Rate between 4th and 15th weeks = 90-46/15-4= 44/11 = 4

Answer 8

And do the same for other weeks as well and then u will get the same rate. which is 4