# SAT Math: Recognizing the Slope in a Given Linear Function

Hugo is flying a helicopter and needs to descend to a heliport located at sea level. Once he begins his descent, the helicopter's altitude can be modeled by the equation above, where A is his altitude of his helicopter in meters and t is the number of seconds that have passed since he began his descent. According to the model, what does the number -2.3 represent?

Heart of Algebra | Interpreting linear functions |

Product Type | SAT Math |

SAT | SAT Math |

SAT Math | Algebra and Functions Heart of Algebra |

Test Prep | SAT Math |

### Transcript

Hugo's altitude over time and slope intercept form Why equals

MX plus B in place of why we're given a

thie out student Hugo's helicopter in meters after a given

amount of time we have another variable in place of

acts That's he right there or the number of seconds

that have passed since Hugo began his descent Well the

slope is negative two point three and it is in

front of the amount of time that has passed so

big Hint there That's kind of the crux of the

issue they're testing you on slopes almost always refer to

a type of rate such as dollars per person and

dollars per time miles per hour shmoop ce per second

or something like that In this case it's meters per

second It's whatever is on the Y axis per whatever

is on the X axis Right rise How far up

on the Y axis over Run How far along on

the X axis Something like that to rate here That

means the amount about stewed loss since Hugo is going

down per second on the slope is negative which means

negative Two point three is Hugo's rate of descent in

meters per second So the answer is D we'll wire

The other answer choice is oh so wrong Well we

don't know the altitude of the heliport so can't be

a Yugo could be descending straight to the center of

the earth for all we know Since problem does not

tell us the minimum value of A we already know

that t rather than negative two point three represents the

amount of time Hugo has been descending So it ain't

B and then Hugo starting altitude Yeah see there is

the constant B from the equation of a line or

four thousand fifty nine meters in this case so that's

it The answer is D That's the rate of Hugo's 00:02:01.56 --> [endTime] de Centeon meters per second