a line passes through the points -3,1 and 6,4 write the equation of the line in slope intecept

Still don't get it

the slope is (4-1)/(6+3) = 1/3

So, the point-slope form is

y-4 = 1/3 (x-6)
y = 1/3 x + 2

Or, using the other point,

y-1 = 1/3 (x+3)
y = 1/3 x + 2