Slope-intercept formHSF.LE.A.2Write y = mx + b from a slope and a point, or from two points.Exponential growth and decayHSF.LE.A.2Evaluate exponential functions and use y = a(1 + r)ᵗ and y = a(1 − r)ᵗ for percent growth and decay.Writing exponential functionsHSF.LE.A.2Find a and b in y = a·bˣ from two points one step apart, including decay with a fractional base.Writing linear equations from graphsHSF.LE.A.2Read two points on a graphed line, find its slope from the rise over the run, and write its equation in slope-intercept form.Evaluating logarithmsHSF.LE.A.4Evaluate logarithms by asking what power of the base gives the number, including answers that are negative or fractions.Properties of logarithms (expanding and condensing)HSF.LE.A.4Use the product, quotient and power rules to expand a logarithm into separate logs, and to condense several logs into one.Solving exponential equationsHSF.LE.A.4Solve exponential equations by writing both sides with the same base, and with logarithms when that isn't possible.Solving logarithmic equationsHSF.LE.A.4Solve logarithmic equations by rewriting them in exponential form, combining logs first when there are two, and rejecting extraneous solutions.