Write an equation for the proportional relationship shown in the graph.
Graph necklace sales through (0,0) and (4,12)
Necklace Sales
Total Amount Earned (Dollars)
(4,12)
(0,0)
Number Sold
DO NOT USE ANY SPACES between variables, constants, equals signs, and operation signs.
For example, DO NOT enter y = 2x+1.
DO ENTER: y=2x+1.
Put parentheses around constants that are fractions like this: y=(2/3)x-(1/2)
To write your equation, use the variables:
n = number of necklaces sold
a = total amount earned on necklaces ($)
The equation in slope-intercept form is