can some one please answer my last 3 questions for the day? it answer choice and for 30pts! brainliest, rattings, thanks, etc

Answer:6  C = 2+12r7.y = .026x -.05 8.The slope is 5 and the y intercept is -29  x= 3Step-by-step explanation:6.  The cost of the arrangement is the cost of the vase plus the cost of 12 rosesC = vase +12 rosesEach vase is 2 dollars and each rose costs rC = 2+12r7.  We need to find the slopem = (y2-y1)/(x2-x1)    =( 5.15 -1.25)/ (200-50)     (3.9)/150   .026We know the slope and a point we can use point slope formy-y1 = m(x-x1)y -1.25 = .026(x-50)Distributey-1.25 = .026x -1.3Add 1.25 to each side y-1.25+1.25 = .026x -1.3+1.25y = .026x -.05 8.  y = 5x-2This is written in slope intercept form y= mx +b where m is the slope and b is the y intercept.The slope is 5 and the y intercept is -29.  The x value does not change in this vertical line.  Vertical lines are x=x= 3