(1/4) to the power of 3 HEL

Which graph represents the equation y =4x

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)