Please can you help with all these questions? It’s due Monday

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.

Brent wants to know what is 5 x 1/2

Sum is 17 and their difference is 3