Question

Use 2 points to write an equation for each function. Exponential functions.

Answer 1

`y=ma^x\\\\(0;\ 10)\to m\cdot a^0=10\to m=10\\\\y=10a^x\\\\(1;\ 20)\to 10a^1=20\ \ \ |:10\\a=2\\\\\boxed{y=20\cdot2^x}\\\\check:\\(-2;\ 2.5)\to2.5=10\cdot2^(-2)\\\\2.5=10\cdot(1)/(2^2)\\\\2.5=10\cdot(1)/(4)\\\\2.2=2.2\ correct\ :)\\\\(2;\ 40)\to40=10\cdot2^2\\\\40=10\cdot4\\\\40=40`

Answer:
`\boxed{y=10\cdot2^x}`