The slope-point formula of a line:
[tex]y-y_1=m(x-x_1)[/tex]
We have:
[tex]m=1.8,\ (-4.5,\ 1.4)\to x_1=-4.5,\ y_1=1.4[/tex]
Substitute:
[tex]y-1.4=1.8(x-(-4.5))\\\\\boxed{y-1.4=1.8(x+4.5)}[/tex]
