What is 54/100 ins simplest form and 72/100, 90/100?

In 54/100, 2 is the only common factor.  Dividing 54 and 100 both by 2, we get 27/50.  This is the simplest form of 54/100.  Note that 54/100=0.54.

In 90/100, 10 is the only common factor.  Divide both 90 and 100 by 10.  We get 9/10.  That's the simplest form.

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!