JayLiz1737

28.01.2020 • 

Mathematics

(05.03 mc)

eva has borrowed 200 songs from her friend. she plans to download an equal number of songs on her music player each week for 5 weeks. the graph shows the number of songs left to download, y, for a certain number of weeks, x:

a graph titled song downloading shows number of weeks on x-axis and number of songs left to download on y-axis. the x-axis scale is shown from 0 to 5 at increments of 1, and the y-axis scale is shown from 0 to 280 at increments of 40. a straight line joins the ordered pairs 0, 200 and 1, 160 and 2, 120 and 3, 80 and 4, 40 and 5, 0.

part a: what is the rate of change and initial value of the function represented by the graph, and what do they represent in this scenario? show your work to find the rate of change and initial value. (6 points)
part b: write an equation in slope-intercept form to model the relationship between x and y. (4 points)

Ответ:

kprincess16r

16.01.2022

Mathematics

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A) The rate of change is -40 songs each week, that is because the amount of songs left to be downloaded decrease by 40 each week

B) lets use 2 points of the graph p1(0, 200), p2(1, 160)
calculate the slope:
m = (y2- y1)/(x2 - x1) = (160 - 200)/(1 - 0)
m = -40
now use line equation in form point-slope:
y - y1 = m(x - x1)
y - 200 = -40(x - 0)
y = -40x + 200

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Ответ:

kodyharris117

07.01.2020

Mathematics

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2 radical 5

Step-by-step explanation:

Radical 20

5 and 4 go into 20

Then 2 and 2 go into 4

Since their is two 2’s they go on the outside of the radical

Then 5 goes into the radical since nothing could go into 5

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