Question

the function (f(x)=\frac{8.5x^{2}-84.2x + 3740}{x^{2}+678}) models the ph level, (f(x)), of a mouth (x) minutes after eating food containing sugar. the graph of this function is shown to the right. complete parts (a) through (e).
a. use the graph to obtain a reasonable estimate, to the nearest tenth, of the ph level of the human mouth 30 minutes after a person eats food containing sugar.
the ph level after 30 minutes is (square) (round to the nearest tenth as needed.)

Explanation:

Step1: Locate x - value on graph

Locate x = 30 on x - axis.

Step2: Find corresponding y - value

Find the point on the curve above x = 30 and read the y - value. The y - value represents the pH level. By looking at the graph, when x = 30, the y - value is approximately 4.8.

Answer:

4.8