Sergio has 79 paintings in his art collection. He and other local painting collectors agreed to donate some paintings to the loc
1 answer:
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Answer:
Step-by-step explanation:
1) Use point-slope formula to find the slope-intercept form (or y = mx + b form) of the equation. m represents the slope, and
and
represent the x and y values of a point the line intersects. So, substitute
for m, -4 for
, and 7 for
. Then, simplify and isolate y on the left side like so:
Answer:
D'G' = 52.5 units
Step-by-step explanation:
Since the dilatation is centred at the origin then multiply the original coordinates by the scale factor 3.5
D' = (1 × 3.5, 7 × 3.5 ) = (3.5, 24.5 )
G' = (- 8 × 3.5, - 5 × 3.5 ) = (- 28, - 17.5 )
Calculate D'G' using the distance formula
d =
with (x₁, y₁ ) = D' (3.5, 24.5) and (x₂, y₂ ) = G' (- 28, - 17.5)
D'G' =
=
=
=
= 52.5 units