A phone was purchased for $318. Each year the value is 1/2 of its value the previous year. Write a function that describes the value of the phone, in dollars, as a function of the time in years, t, after the initial purchase?

y=318(1-0.5)^x

Step-by-step explanation:

x represents the amount of years and y is the ending price

i would need to see the dot plot : )

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²