Question

Loren solved the equation 10 = StartFraction 19 Over 9 EndFraction (149) + b for b as part of her work to find the equation of a trend line that passes through the points (1, 130) and (10, 149). What error did Loren make?

A.) She should have solved 10 = StartFraction 9 Over 19 EndFraction (149) + b for b.

B.)She should have solved 1 = StartFraction 19 Over 9 EndFraction (130) + b for b.

C.)She should have solved 149 = StartFraction 19 Over 9 EndFraction (10) + b for b.

D.)She should have solved 130 = StartFraction 9 Over 19 EndFraction (1) + b for b.

Answer 1

isk it would not let me do mathmatics

Answer 2

wym?

Answer 3

could you tell me what you are confused about

Answer 4

\(\color{#0cbb34}{\text{Originally Posted by}}\) @sophiaespinosa
isk it would not let me do mathmatics
\(\color{#0cbb34}{\text{End of Quote}}\)
the way you said this ^^

Answer 5

sorry i did the wrong key when writing idk and it would not let me pick the subject mathmatics

Answer 6

\(\color{#0cbb34}{\text{Originally Posted by}}\) @sophiaespinosa
sorry i did the wrong key when writing idk and it would not let me pick the subject mathmatics
\(\color{#0cbb34}{\text{End of Quote}}\)
thats weird...anyways...do you understand how to solve this question?

Answer 7

no

Answer 8

I cant tell you how hard I am dying from the comment before he said no XD

Answer 9

the generic equation for a line is

y = mx + b
using the equation they give you:

10 = (19/9)(149) + b

it's clear that she plugged in (10, 149) into the equation y = (19/9)x + b and tried to solve for b.

for the point (10,149), x = 10 and y = 149. but notice how this person reversed the x and y values (they plugged in y = 10 and x = 149 instead)

with that being said, which answer choice shows them plugging in the numbers correctly?

Answer 10

A?

Answer 11

you're on the right track, but keep in mind answer A doesn't solve the problem that she switched the x and y values

try swapping the x and y values in her work, and see what answer choice you get

Answer 12

D i'm sorry if i'm wrong i'm just panicking because its timed and I only have a little left

Answer 13

the x-value is 10, the y-value is 149

therefore, swapping 10 and 149 in the equation 10 = StartFraction 19 Over 9 EndFraction (149) + b gives you choice C

Answer 14

oh ok thank you i will look in on how you got the answer in the writing