Name ………………………………………………………….………………., grade……………………………., date………………………………………..
TEST 3C Linear models
1. It’s given: y  3x  1
a) Find x – intercept
b) Find y – intercept
c) Plot the graph
d) Decide if A = (-2, -4) B = (15, -44) is on the Line
e) Find the pattern of parallel line to y  2x  7 with y – intercept of value -5.
g) Find the pattern of perpendicular line to y  2x  7 , with y – intercept of value 3.
g) Find the pattern of perpendicular line to y  2x  1 , which goes through (10, 2).
2. There are points: A = ( -2, -3) and B = (3, 7)
a) Calculate the gradient
b) Find the equation of the line, which crosses given points
b) Find y – intercept
b) Find x – intercept
3. Currency rate USD(EU) is described by the gradient. Find the linear model if you pay 1USD for exchange operation
and 7USD (including costs) for 4 EU and 31USD (with costs) for 20 EU. EU – euro, USD – US dollar
a)How much do you pay for 10 EU
b)How many EU can you exchange for 101USD?
4. Draw lines given by the equations: y = x, y = -3, x = 2, y = -x, x = -1 , y = 2. Decide which line represents the
linear function.