1. the y-intercept is the point Y(0, -1.5) that means it is situated on the negative y-axis, 1.5 units below the x-axis.
2. You need a 2nd point to draw the line. Calculate the x-intercept by plugging in y = 0. You'll get the point Z(3, 0).
3. It isn't necessary to use the axes intercepts. Choose 2 x-values, plug them into the equation and calculate the corresponding y-values. Draw these 2 points and connect them with a straight line:
x = 1 ===> y = -1
x = -5 ===> y = -4
So you have 2 points: A(1, -1) and B(-5, -4) and now you can easily draw the line.