camilabravo1202 camilabravo1202
  • 30-10-2020
  • Mathematics
contestada

please help !! write an expression that can be used to determine the total change

please help write an expression that can be used to determine the total change class=

Respuesta :

karlo26hernandez
karlo26hernandez karlo26hernandez
  • 30-10-2020

Answer:

y = 125x + 775

Step-by-step explanation:

you can make coordinate points (x, y) from the graph

x = Number of hours

y = Total Charge

(1, 800) and (2, 925)

slope from 2 points = y2-y1/x2-x1

x1 = 1

y1 = 800

x2 = 2

y2 = 925

925 - 800/2-1 = 125/1

m = 125

using y = mx + b, where m = 125,  and 1 of the coordinate points you can find the y intercept

multiply 125 times 2

925 = 250 + b

subtract 250 from both sides

b = 675

y = 125x + 675

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