Question 1203700
Description represents a  point on a line (26,28430)and a vertical axis intercept 3900.  This means, another point is  (0,3900).   You have either of two equation forms to help.


You could try this, as for slope-intercept form:

{{{C=((28430-3900)/(26-0))x+3900}}}

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Each "additonal" bike is, the value of the slope.