18. The line with equation y 5x+b where bis a constant, passes through the point (1, 7). What is b? 19. The graphs of the lines y = 4-x and x= -9intersect at a point. What is the y-coordinate of the point? 20. The graphs of the lines y = 9 =x and x= -5 intersect at a point. What is the y-coordinate of the point?

5. Write an equation in point-slope form that has the same slope as y=x+4 and passes through the point (2, 5). Oy-5=4(x-2) Oy-5=(x-2) Oy-2=4(x-5) Oy-2= (2-5)

Can you please do a step by step process to help me get this concept down?

11. What is the slope of the line passing through the given points: a) (3, 2) and (-1, 2) b) (-4, 2) and (-4,-2)? 12. Find the x and y intercepts of the line 2x-3y = 12 and use them to graph the line. (2pts) 13. Write the equation of the line with slope 2 and passing through (1, 3). 14. Internet Users. The number of Internet users I in millions during year x, where x ≥ 2000 can be approximated by the formula, I=116x-231,627. Approximate the year in which there were 490 million Internet users for the first time. 15. A jewelry maker incurs costs for a necklace according to C(x) = 35x+1650. If the revenue function for the necklaces is R(x) = 85x, how many necklaces must be sold to break even? In accounting and business, the break-even point is the production level at which total revenues equal total expenses. O Search @