The following graph shows the relationship between cost and revenue for a manufacturer of lab coats.

i - cost: 1.5n+1,600
ii - cost: 4.5n+1,600
iii - revenue: 3.25
iv - revenue: 5.75

which of the following pairs of equations best suits this graph?

a.
i and iii

b.
i and iv

c.
ii and iii

d.
ii and iv

Option a.

I and III

Step-by-step explanation:

Observing the graph

For n=400 coats

The cost is about $2,200

and

The revenue is less than $1,400

Substitute the value of n=400 in each equation to find the solution

I Cost 1.5(400)+1,600=$2,200 > is ok

II Cost 4.5(400)+1,600=$3,400 > is not ok ( is greater than $2,200)

III Revenue 3.25(400)=$1,300 > is ok ( is less than $1,400)

IV Revenue 5.75(400)=$2,300 > is not ok ( is greater than $1,400)

therefore

The solution is I and III

Ugh ok... (0, 6) (0.5, 5.5) (1,5) (1.5,4.5) and so on.. I got these by subtracting 0.5 from each pair on the right and adding 0.5 to the pair on the left. Because the candle is going down.

B yes this a function because the input is related to the output