Jillian is participating in a book-reading contest to raise funds for her local library. for every book jillian reads, her mother pledged to make a donation.
a: the table shows how much jillian's mother will donate. find the pattern, and give the amount her mother will donate for 9 and 21 books read.
(btw it won't let me upload a pic of the table so this is what it said)

br: 3. 5. 7
md: $15. $25. $35

(ps. br means books read and md means money donated)

b: write an equation showing the pattern from the table. identify the variables.

c: graph the equation.

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?