Question 1014428
Use the general point-slope formula
Plot number of immigrants on the vertical axis
Plot time in years on the horizontal axis
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(a)
{{{ ( y - 1003216 ) / ( t - 51 ) = ( 2247982 - 1003216 ) / ( 0 - 51 ) }}}
{{{ ( y - 1003216 ) / ( t - 51 ) = 1244766 / ( -51 ) }}}
{{{ ( y - 1003216 ) / ( t - 51 ) = -24407.176 }}}
{{{ y - 1003216 = -24407.176*( t - 51 ) }}}
{{{ y - 1003216 = -24407.176t + 1244765.9 }}}
{{{ y = -24407.176t + 1244765.9 + 1003216 }}}
{{{ y = -24407.176t + 2247981.9 }}}
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(b)
2018 is 68 years after 1950
{{{ y = -24407.176t + 2247981.9 }}}
{{{ y = -24407.176*68 + 2247981.9 }}}
{{{ y = -1659687.9 + 2247981.9 }}}
{{{ y = 588294 }}}
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(c)
Is that 20th century or 21st century?
21st makes more sense to me.
2100 would be 150 yrs after 1950
{{{ y = -24407.176t + 2247981.9 }}}
{{{ y = -24407.176*150 + 2247981.9 }}} 
{{{ y = -3661076.4 + 2247981.9 }}}
{{{ y = -1413094.5 }}}
The population can't be negative, so the
formula doesn't work all the way
to the end of the 21st century