Question

The graph represents the cost of a subscription to a newspaper.

A coordinate plane showing Ferry Ride Cost with Number of Persons on the x-axis and Total Cost in dollars on the y-axis with a line passing through points at (1, 2) and (5, 8).
What is the constant of variation for the subscription cost based on the number of weeks?

$1.50
$7.50
$15.00
$30.00

Answer 1

Slope = rise/run = (8 − 2)/(5 − 1) = 6/4 = 1.5, so the constant of variation is $1.50.