The points (-1,4) and (2,r) lie on the line with slope -3. find the missing coordinate r. r=?

r=-5

Step-by-step explanation:

-3=r-4/2-(-1) (plug into the slope formula)

-3=r-4/3 (solve the denominator)

-9=r-4 (multiply both sides by 3)

-5=r (add 4 to both sides)

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.