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Introduction to Graphs — Chapter Test

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Q1
The point where the two axes meet is the ___ ?
The axes meet at the origin.
Q2
The coordinates of the origin are ___ ?
The origin is (0, 0).
Q3
In (x, y), the first number is the ___ ?
The first number is the x-coordinate.
Q4
A point on the x-axis has y-coordinate ___ ?
On the x-axis y = 0.
Q5
What is the x-coordinate of (7, 2)?
The first number is 7.
Q6
On y = 2x, what is y when x = 3?
y = 2 × 3 = 6.
Q7
On y = x + 1, what is y when x = 4?
y = 4 + 1 = 5.
Q8
The point (0, 6) lies on the ___ ?
x = 0, so it lies on the y-axis.
Q9
On y = 3x, what is y when x = 5?
y = 3 × 5 = 15.
Q10
What is the y-coordinate of (4, 9)?
The second number is 9.
Q11
On a distance-time graph, a steeper line shows ___ ?
A steeper distance-time graph means greater speed.
Q12
1 pen costs ₹10. On a cost-quantity graph, what is the cost of 4 pens?
4 × 10 = ₹40.
Q13
On y = 2x + 1, what is y when x = 3?
y = 2 × 3 + 1 = 7.
Q14
A point (a, 0) lies on which axis?
Since y = 0, the point is on the x-axis.
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