MathLab with Mr. Ahmed

MathLab with Mr. Ahmed is a math learning website by Ahmed Amasha, a mathematics teacher teaching the American curriculum. Explore Algebra 2, Precalculus, Calculus, and SAT and PSAT Math Prep through lessons, focused practice and printable resources.

MathLabwith Mr. Ahmed
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Nonlinear functions

Question 1 of 3

Know the idea

The function ff is defined by f(x)=3x2+1f(x) = 3x^{2} + 1. What is the value of f(−4)f(-4)?
Worked example
f(−4)=3(−4)2+(1)=3(16)+(1)=49f(-4) = 3(-4)^{2} + (1) = 3(16) + (1) = 49.
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An object'ss fall time is modeled by t=h5t = \sqrt{\frac{h}{5}}, where hh is the fall distance in meters and tt is time in seconds. According to the model, what distance corresponds to 44 seconds?