Both the SAT & ACT Math sections involve the manipulation of equations and solving linear systems.

Percent change formula: [(new-old)/old]*100

When you raise an exponent to another power, you multiply the 2 exponents. When you multiply the bases, you add the exponents.

For linear functions start with slope. Solve for slope then set up y=mx+b. Then solve for b.

To find x int set y=0. To find y int set x=0.