Final answer:
To find the missing coordinate r, we can use the slope formula and solve for r.
Step-by-step explanation:
To find the missing coordinate r, we can use the slope formula: m = (y2 - y1) / (x2 - x1). Given that the slope is 5/4 and we have two points (-10, r) and (-6, 9), we can plug these values into the formula to solve for r.
(5/4) = (9 - r) / (-6 - (-10))
By solving this equation, we will find the missing coordinate r.
Learn more about Finding the missing coordinate r on a line with a given slope