Answer:
y=mx+c or y=mx+b
gradient = rise/run
= 1 ( sloped upwards)
y= (1x)+c
y=x+c
to find c, we have to input values for x and y
take one point from the line on the graph, suppose...
(x,y) : (-3,2)
2=-3+c
5=c
y=x+5
to solve for y, x will always be 0
y=0+5
y=5