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lilnicki32
write the points(2,21.75) and (4, 21) as slope intercept form
\[m=\frac{21.75-21}{2-4}\]
y=mx+b so you got m above now plug in a point (x,y)=(4,21) to find b
insert a point into the equation y = mx + b and solve for b (x,y)
slope = (21.75 - 21)/(2-4) = 0.75/-2 = -0.375 now use point-slope y - 21 = -0.375(x - 4) multiply by 1000 1000y - 21000 = -375x + 1500 add 21000 1000y = -375x + 22500 divide by 1000 y = -.375x + 22.5
with fractions y = (-3/8)x + 45/2