.
Take graph paper, a pencil and a straightedge.
On the graph paper, draw x-axis and y-axis; then draw the point A = (4,-5).
After that, draw the second point B as described:
from A, go 1 unit horizontally to the left and 3 units vertically up.
Mark new point as B.
Now use the straightedge and the pencil and connect the points A and B by straight line.
At this point, you complete your job.
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Did you hear this standard explanation from your teacher at least once ?
It is what you can read in any textbook, and it is what every teacher explains to pupils in primary school,
right after the multiplication table.