Calculate the area of a circle with diameter of 6cm

Area of circle = pi times radius sqauared
Radius is from center of circle to edge
Diameter is from one side of circle to the other throygh center
Therefore radius is half the diameter
a = pi * 3^2 = 28.3cm^2 (3sf)

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!