SOLUTION: In 1955, a collectors coin cost $45. Thirty years later, the coin valued $180. What was the average yearly increase in the coins value?

Question 830746: In 1955, a collectors coin cost $45. Thirty years later, the coin valued $180. What was the average yearly increase in the coins value?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
---
given:
1955, 45
1985, 180
---
to solve the linear equation, copy and paste this (the two given points):
1955, 45, 1985, 180
into the "Two-Point form: x1 y1 x2 y2" input box here: https://sooeet.com/math/linear-equation-solver.php
---
x-intercept = (1945, 0)
y-intercept = (0, -8752.5)
slope = 4.5
---
the linear model:
v(t) = 4.5t - 8752.5
where:
t = years
v = coin value (dollars)
---
answer:
the average yearly increase in value is the slope of the linear model = $4.50
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
RELATED QUESTIONS
. The function f(x) = 0.0037x^2 � 0.41x +36.23 models the average age at which Kentucky... (answered by ewatrrr)

LOGIC PUZZLE (SHOW COMPLETE SOLUTION) The cities of Atlanta, Chicago, Philadelphia,... (answered by JBnovelwriter)

LOGIC PUZZLE The cities of Atlanta, Chicago, Philadelphia, and San Diego held... (answered by JBnovelwriter)

A silver coin was purchased for $430 in 1985.The market value for silver declined to the... (answered by stanbon)

A television set that originally cost $1955 was reduced in price by successive discounts... (answered by ikleyn)

The population of a city was 63,900 in 1955, an increase of 6.5 percent over a previous... (answered by flame8855)

In 1955 an antique car that originally cost $3,778 is valued today at $63,525 if in... (answered by KMST,MathTherapy)

A machine that costs 2,800 was sold for 600 after it had been used for five years. what... (answered by rmnavalta)

If a new car is valued at $24,800 and 8 years later it is valued at $8000, then what is... (answered by Alan3354)