What is the slope of the line through point B, perpendicular to line k?

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

Evaluate the expression for the given value of the variable. ∣-4b-8∣+∣-1-b^2 ∣+2b^3 ; b=-2

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x