Question

The cost varies directly with the number of tickets purchased. It costs $145 for 10 people to attend a concert.

Answer 1

Answer:

(a)

$k=14.5$

(b)

$C=14.5x$

(c)

the cost of 8 people is $116

(d)

Graph is attached

Step-by-step explanation:

we are given

It costs $145 for 10 people to attend a concert

(a)

Number of people =10

Total cost =145

now, we can find constant  proportionality

k= ( total cost)/(number of people)

$k=\frac{145}{10}$

$k=14.5$

(b)

Let's assume

cost is C

number of people as x

so, we can set equation as

$C=kx$

now, we can plug value

$C=14.5x$

(c)

we can plug x=8

$C=14.5\times 8$

C=116

So,

the cost of 8 people is $116

(d)

we can draw graph