The equation of a line is slope-intercept form which is y=mx+b. (0,5) is the y intercept so we know that b=5. To find the slope plug in the two points into y2-y1/x2-x1. 8 and 5 are the y’s so 8-5=3 over 5-0=5 so the final slope is 3/5. That makes the equation of the line y=3/5-5. Hope this helped!