B. 135: 90
Simplify the ratio

3/2

Divide both 135 and 90 by 45 and you get 3 and 2

Hcf of 90 and 135 is 45.
45 can go into 90 twice and 135 three times.
Simplified ratio (Answer) is 3:2.

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!