Parallel to y=4x-5, y-intercept at -6?

How do i do this? i don’t understand

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)