Question 997141
x, how many cards
y, cost of printing x cards
-
POINTS:  (200,23) and (500,35).


Use the two points to find the equation of the line which contains them, in slope-intercept form.


See here for an example for how:
<a href="https://www.youtube.com/watch?v=VDKztVZUgnM">Equation of Line Containing Two Given Points - example</a>