a linear function contains the following points what are the slope and y-intercept of this function (0,-3) (6,15)
A. the slope is -3. the y intercept is (0,-3)
B. the slope is 1/3. the y-intercept is (0,-3)
C. the slope is 3. the y-intercept is (0,-3)
D. the slope is 1/3. the y-intercept is (-3,0)​