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Emily designed a robot that could climb down steps. She drew a graph to show the result from a test of her new robot. The graph shows the number of steps remaining over time. 

Which equation represents Emily's situation where x is the number of seconds and y Is the number of steps. 

 

https://snag.gy/8o6mG0.jpg

 

What is the equation in standard form?  

 

 

hoiuu  Oct 22, 2018
edited by hoiuu  Oct 22, 2018
 #1
avatar+90969 
+1

We have the points   (0, 15)  and  ( 150, 0 )

 

Slope  =  [  0 - 15  ]  / [ 150 - 0 ]  =   -15 / 150   =  - 1 / 10

 

Equation using  ( 0 , 15)

 

y  = (-1/10) ( x - 0) + 15

 

y = (-1/10) x + 15     multiply  through by -10

 

-10y = x - 150     add 10y to both sides

 

0  = x + 10y - 150

 

1x + 10y - 150  =  0    ⇒  Standard Form

 

 

cool cool cool

CPhill  Oct 22, 2018

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