Describe a situation with two quantities that have a proportional linear relationship.

I went to a store to buy pencils.

The pencils cost 25 cents each.

1 pencil costs 25 cents.

2 pencils cost 50 cents.

3 pencils cost 75 cents.

10 pencils cost 250 cents ($2.50)

The relationship between the price of pencils and the number of pencils is linear.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,