The slope-intercept form of a line is:
y=mx+b, where m=slope and b=y-intercept
First find the slope, which is the change in y divided by the change in x, mathematically:
m=(y2-y1)/(x2-x1), where (x1,y1) and (x2,y2) are any two points...
m=(-5--5)/(7-2)
m=0/5
m=0, so this line has zero slope, thus it is a horizontal line of the form:
y=k, where k is the constant value of y, in this case y=-5 so
y=-5
