The value of y varies directly with x. when y = 7, x = 2. what is the value of x when y is 21?

How do you find the equation of line of best fit? urgent

Note: enter your answer and show all the steps that you use to solve this problem in the space provided. x − 2 − 1 0 1 2 y use the function rule to complete the table. − 10 x + y = 4

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!