ACT Formulas

midpoint

slope

distance

average

y = mx + b

y = mb + x

y = x

y = -mx + b

$$d\ =\ \sqrt{\left(y_{1\ }-\ y_2\right)^2\ -\left(x_{2\ }-\ x_1\right)^2}\$$

$$d\ =\ \sqrt{\left(x_{2\ }-\ x_1\right)^2\ +\ \left(y_{2_{\ }}-\ y_1\ \right)^2}$$

$$d\ =\ \sqrt{\left(y_{1\ }-\ y_2\right)^2\ +\ \left(x_{2\ }-\ x_1\right)^2}$$

d = $$\sqrt{\left(x\right)^2-\ \left(y\right)^2}$$

difference of quantities divided by no. of quantities

product of quantities divided by no. of quantities

sum of quantities divided by no. of quantities

None of the above