# GED Math 5.5 Graphs and Functions

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GED Math: Graphs and Functions Drill 5, Problem 5. What is the value of a?

Functions | Analyze functions using different representations Construct and compare linear, quadratic and exponential models Construct and compare linear, quadratic, and exponential models Interpret expressions for functions in terms of the situation they model Interpret functions that arise in applications Interpret functions that arise in applications in terms of context Linear Functions Quadratic Functions |

GED | GED Math |

GED Math | Graphs and Functions |

Language | English Language |

Mathematical Practice | Mathematical Fluency |

Test Prep | GED GED Math |

### Transcript

let's take a quick inventory way Have a problem We

have a graph and we have our brain Hopefully that's

enough The equation of the parabola is given its why

equals x squared minus two x plus six and we're

being asked to find the value of a right No

problems There are a few points this parable of passes

through i look to this graph Negative six zero hero

thing two zero we can plug in any of them

But what fans of small numbers around here so let's

use to zero the equation will become zero equals a

times two squared minus two times to plus six We

could clean that puppy up a bit but two squared

is four and two temps two is also four so

we can rewrite as zero equals for a minus four

plus six and of course the minus foreign plus six

Or really just positive too So we're left with zero

equals four a plus to subtract two from both sides

to get negative Two equals for a then divide Both

sides fight for to get negative a half people's a

and it looks like our answer is c nice work 00:01:23.092 --> [endTime] framed on your end