## In a city, electricity charges are calculated as follows: A fixed charge of $20 plus 30 cents per unit of electricity used. Taking

Question

In a city, electricity charges are calculated as follows:

A fixed charge of $20 plus 30 cents per unit of electricity used.

Taking 2 cm to represent 50 units on the horizontal axis and 2 cm to represent $20 on

the vertical axis, draw a graph to show the charges up to a maximum of 400 units.

From your graph, estimate

(a) the cost of using the following units of electricity:

(i) 110 (ii) 235 (iii) 79

(b) the number of units of electricity used if the bill is:

(i) $47 (ii) $66.50 (iii) $95

Pls answer ASAP

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2022-02-15T06:35:42+00:00
2022-02-15T06:35:42+00:00 1 Answer
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## Answers ( )

Answer:Step-by-step explanation:fixed charge of $ 20 + 0.30 per unit

y = 0.30x + 20….where x = # of units and y = total cost

using 110 units.. using 235 units using 79 units

y = 0.30(110) + 20 y = 0.30(235) + 20 y = 0.30(79) + 20

y = 33 + 20 y = 70.50 + 20 y = 23.70 + 20

y = $ 53 <=== y = $90.50 <=== y = $43.70 <==

as far as graphing purposes…

ur x axis (the one going across) is gonna be ur units and ur y axis (the one going up and down) is gonna be the total money

y = 0.30x + 20

u have a slope of 0.3

ur y int is (0,20)…..ur x int is (-200/3,0)