SAT Math / High Yield Lessons
Tell growth from decay at a glance, read the starting value and the factor from an exponential equation, and turn a percent in a word problem into the right equation.
The curve y equals 4 times 2 to the x is drawn starting at (0, 4), and hops show it doubling at each step to 8, 16, and 32. Next, a question asks what y equals 4 times 1.5 to the x will do if b goes from 1.5 to 0.5, and the prediction fall toward 0 is picked. Dragging the b slider to 0.5 makes the curve halve at each step, 4, 2, 1, and the prediction is marked right. Then the story a town's population grows by 5% each year is sorted as exponential, not linear. Finally, answer by what percent y equals 10 times 0.6 to the x decreases at each step, using the buttons after the picture.
