Is it necessary to add a zero after 1.08 to find the sum

Which of the following is the formula for the sequence graphed below

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.