Pls answer asap and pls no wrong answers ;-;

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula, equation, to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

Which equation matches the graph shown ?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)