Question

Number of drops(d) of Chemical Y is added to the solution(s) to change the growth rate of microbes and the observation is drawn on the given graph. Find which of the following equations is represented on the graph.

• A. s = 4.5d
• B. s = 13.5d
• C. s = 2.5d
• D. s = 3d

Answer 1

The correct option is C s = 2.5d

From the given graph take one point (4, 10).

The required equation is y= mx.

If 4 drops are used, the solution is 10 ml

m = $\frac{y}{x}$=$\frac{10}{4}$ = 2.5

s = 2.5 d

Hence, the required equation is s = 2.5 d