HELP PLZ~~
1-An iron bar is heated. Its length, , in millimetres can be modelled by a linear function, = + , where is the temperature measured in degrees Celsius (°C). At 150°C the length of the iron bar is 180 mm.
Write down an equation that shows this information.

2-At 210°C the length of the iron bar is 181.5 mm. Hence, find the length of the iron bar at 40°C.

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !